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sputtering</title> <meta name="description" content="Search results for: magnetron sputtering"> <meta name="keywords" content="magnetron sputtering"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block d-lg-none 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action="https://publications.waset.org/abstracts/search"> <div id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="magnetron sputtering"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 132</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: magnetron sputtering</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">102</span> Doped TiO2 Thin Films Microstructural and Electrical Properties</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mantas%20Sriubas">Mantas Sriubas</a>, <a href="https://publications.waset.org/abstracts/search?q=Kristina%20Bockute"> Kristina Bockute</a>, <a href="https://publications.waset.org/abstracts/search?q=Darius%20Virbukas"> Darius Virbukas</a>, <a href="https://publications.waset.org/abstracts/search?q=Giedrius%20Laukaitis"> Giedrius Laukaitis</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this work, the doped TiO2 (dopants – Ca, Mg) was investigated. The comparison between the physical vapour deposition methods as electron beam vapour deposition and magnetron sputtering was performed and the structural and electrical properties of the formed thin films were investigated. Thin films were deposited on different type of substrates: SiO2, Alloy 600 (Fe-Ni-Cr) and Al2O3 substrates. The structural properties were investigated using Ambios XP-200 profilometer, scanning electron microscope (SEM) Hitachi S-3400N, X-ray energy-dispersive spectroscope (EDS) Quad 5040 (Bruker AXS Microanalysis GmbH), X-ray diffractometer (XRD) D8 Discover (Bruker AXS GmbH) with glancing angles focusing geometry in a 20 – 70° range using the Cu Kα1 λ = 0.1540562 nm radiation). The impedance spectroscopy measurements were performed using Probostat® (NorECs AS) measurement cell in the frequency range from 10-1-106 Hz under reducing and oxidizing conditions in temperature range of 200 °C to 1200 °C. The investigation of the e-beam deposited Ca and Mg doped-TiO2 thin films shows that the thin films are dense without any visible pores and cavities and the thin films grow in zone T according Barna-Adamik SZM. Substrate temperature was kept 600 °C during the deposition and Ts/Tm ≈ 0.32 (substrate temperature (Ts) and coating material melting temperature (Tm)). The surface diffusion is high however, the grain boundary migration is strongly limited at this temperature. This means that structure is inhomogeneous and the columnar structure is mostly visible in the upper part of the films. According to XRD, the increasing of the Ca dopants’ concentration increases the crystallinity of the formed thin films and the crystallites size increase linearly and Ca dopants act as prohibitors. Thin films are comprised of anatase TiO2 phase with an exception of 2 % Ca doped TiO2, where a small peak of Ca arise. In the case of Mg doped-TiO2 the intensities of the XRD peaks decreases with increasing Mg molar concentration. It means that there are less diffraction planes of the particular orientation in thin films with higher impurities concentration. Thus, the crystallinity decreases with increasing Mg concentration and Mg dopants act as inhibitors. The impedance measurements show that the dopants changed the conductivity of the formed thin films. The conductivity varies from 10-3 S/cm to 10-4 S/cm at 800 °C under wet reducing conditions. The microstructure of the magnetron sputtered thin TiO2 films is different comparing to the thin films deposited using e-beam deposition therefore influencing other structural and electrical properties. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=electrical%20properties" title="electrical properties">electrical properties</a>, <a href="https://publications.waset.org/abstracts/search?q=electron%20beam%20deposition" title=" electron beam deposition"> electron beam deposition</a>, <a href="https://publications.waset.org/abstracts/search?q=magnetron%20sputtering" title=" magnetron sputtering"> magnetron sputtering</a>, <a href="https://publications.waset.org/abstracts/search?q=microstructure" title=" microstructure"> microstructure</a>, <a href="https://publications.waset.org/abstracts/search?q=titanium%20dioxide" title=" titanium dioxide"> titanium dioxide</a> </p> <a href="https://publications.waset.org/abstracts/29364/doped-tio2-thin-films-microstructural-and-electrical-properties" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/29364.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">296</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">101</span> Biocompatibility of Calcium Phosphate Coatings With Different Crystallinity Deposited by Sputtering</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ekaterina%20S.%20Marchenko">Ekaterina S. Marchenko</a>, <a href="https://publications.waset.org/abstracts/search?q=Gulsharat%20A.%20Baigonakova"> Gulsharat A. Baigonakova</a>, <a href="https://publications.waset.org/abstracts/search?q=Kirill%20M.%20Dubovikov"> Kirill M. Dubovikov</a>, <a href="https://publications.waset.org/abstracts/search?q=Igor%20A.%20Khlusov"> Igor A. Khlusov</a> </p> <p class="card-text"><strong>Abstract:</strong></p> NiTi alloys combine biomechanical and biochemical properties. This makes them a perfect candidate for medical applications. However, there is a serious problem with these alloys, such as the release of Ni from the matrix. Ni ions are known to be toxic to living tissues and leach from the matrix into the surrounding implant tissues due to corrosion after prolonged use. To prevent the release of Ni ions, corrosive strong coatings are usually used. Titanium nitride-based coatings are perfect corrosion inhibitors and also have good bioactive properties. However, there is an opportunity to improve the biochemical compatibility of the surface by depositing another layer. This layer can consist of elements such as calcium and phosphorus. The Ca and P ions form different calcium phosphate phases, which are present in the mineral part of human bones. We therefore believe that these elements must promote osteogenesis and osteointegration. In view of the above, the aim of this study is to investigate the effect of crystallinity on the biocompatibility of a two-layer coating deposited on NiTi substrate by sputtering. The first step of the research, apart from the NiTi polishing, is the layer-by-layer deposition of Ti-Ni-Ti by magnetron sputtering and the subsequent synthesis of this composite in an N atmosphere at 900 °C. The total thickness of the corrosion resistant layer is 150 nm. Plasma assisted RF sputtering was then used to deposit a bioactive film on the titanium nitride layer. A Ca-P powder target was used to obtain such a film. We deposited three types of Ca-P layers with different crystallinity and compared them in terms of cytotoxicity. One group of samples had no Ca-P coating and was used as a control. We obtained different crystallinity by varying the sputtering parameters such as bias voltage, plasma source current and pressure. XRD analysis showed that all coatings are calcium phosphate, but the sample obtained at maximum bias and plasma source current and minimum pressure has the most intense peaks from the coating phase. SEM and EDS showed that all three coatings have a homogeneous and dense structure without cracks and consist of calcium, phosphorus and oxygen. Cytotoxic tests carried out on three types of samples with Ca-P coatings and a control group showed that the control sample and the sample with Ca-P coating obtained at maximum bias voltage and plasma source current and minimum pressure had the lowest number of dead cells on the surface, around 11 ± 4%. Two other types of samples with Ca-P coating have 40 ± 9% and 21 ± 7% dead cells on the surface. It can therefore be concluded that these two sputtering modes have a negative effect on the corrosion resistance of the whole samples. The third sputtering mode does not affect the corrosion resistance and has the same level of cytotoxicity as the control. It can be concluded that the most suitable sputtering mode is the third with maximum bias voltage and plasma source current and minimum pressure. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=calcium%20phosphate%20coating" title="calcium phosphate coating">calcium phosphate coating</a>, <a href="https://publications.waset.org/abstracts/search?q=cytotoxicity" title=" cytotoxicity"> cytotoxicity</a>, <a href="https://publications.waset.org/abstracts/search?q=NiTi%20alloy" title=" NiTi alloy"> NiTi alloy</a>, <a href="https://publications.waset.org/abstracts/search?q=two-layer%20coating" title=" two-layer coating"> two-layer coating</a> </p> <a href="https://publications.waset.org/abstracts/172097/biocompatibility-of-calcium-phosphate-coatings-with-different-crystallinity-deposited-by-sputtering" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/172097.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">66</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">100</span> Mott Transition in the VO2/LSCO Heterojunction</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yi%20Hu">Yi Hu</a>, <a href="https://publications.waset.org/abstracts/search?q=Chun-Chi%20Lin"> Chun-Chi Lin</a>, <a href="https://publications.waset.org/abstracts/search?q=Shau-En%20Yeh"> Shau-En Yeh</a>, <a href="https://publications.waset.org/abstracts/search?q=Shin%20Lee"> Shin Lee</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, p–n heterojunctions with La0.5Sr0.5CoO3 (LSCO) and W-doped VO2 thin films were fabricated by the radio frequency (r.f.) magnetron sputtering technique and sol-gel process, respectively. The thickness of VO2 and LSCO thin films are about 40 nm and 400 nm, respectively. Good crystalline match between LSCO and VO2 films was observed from the SEM. The built-in voltages for the junction are about 1.1 V and 2.3 V for the sample in the metallic and insulating state, respectively. The sample can undergo the current induced MIT during applying field when the sample was heated at 40 and 50ºC. This is in agreement with the value obtained from the difference in the work functions of LSCO and VO2. The band structure of the heterojunction was proposed based on the results of analysis. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hetrojection" title="hetrojection">hetrojection</a>, <a href="https://publications.waset.org/abstracts/search?q=Mott%20transition" title=" Mott transition"> Mott transition</a>, <a href="https://publications.waset.org/abstracts/search?q=switching" title=" switching "> switching </a>, <a href="https://publications.waset.org/abstracts/search?q=VO2" title=" VO2"> VO2</a> </p> <a href="https://publications.waset.org/abstracts/7610/mott-transition-in-the-vo2lsco-heterojunction" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/7610.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">589</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">99</span> Optimal Sputtering Conditions for Nickel-Cermet Anodes in Intermediate Temperature Solid Oxide Fuel Cells</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Waqas%20Hassan%20Tanveer">Waqas Hassan Tanveer</a>, <a href="https://publications.waset.org/abstracts/search?q=Yoon%20Ho%20Lee"> Yoon Ho Lee</a>, <a href="https://publications.waset.org/abstracts/search?q=Taehyun%20Park"> Taehyun Park</a>, <a href="https://publications.waset.org/abstracts/search?q=Wonjong%20Yu"> Wonjong Yu</a>, <a href="https://publications.waset.org/abstracts/search?q=Yaegeun%20Lee"> Yaegeun Lee</a>, <a href="https://publications.waset.org/abstracts/search?q=Yusung%20Kim"> Yusung Kim</a>, <a href="https://publications.waset.org/abstracts/search?q=Suk%20Won%20Cha"> Suk Won Cha</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Nickel-Gadolinium Doped Ceria (Ni-GDC) cermet anodic thin films were prepared on Scandia Stabilized Zirconia (ScSZ) electrolyte supports by radio frequency (RF) sputtering, with a range of different sputtering powers (50 – 200W) and background Ar gas pressures (30 – 90mTorr). The effects of varying sputtering power and pressure on the properties of Ni-GDC films were studied using Focused Ion Beam (FIB), X-ray Photoelectron Spectroscopy (XPS), X-ray Diffraction (XRD), Energy Dispersive X-ray (EDX), and Atomic Force Microscopy (AFM) techniques. The Ni content was found to be always higher than the Ce content, at all sputtering conditions. This increased Ni content was attributed to significantly higher energy transfer efficiency of Ni ions as compared to Ce ions with Ar background sputtering gas. The solid oxide fuel cell configuration was completed by using lanthanum strontium manganite (LSM/YSZ) cathodes on the other side of ScSZ supports. Performance comparison of cells was done by Voltage-Current-Power (VIP) curves, while the resistances of various cell components were observed by nyquist plots. Initial results showed that anode films made by higher powered RF sputtering performed better than lower powered ones for a specific Ar pressure. Interestingly, however, anodes made at highest power and pressure, were not the ones that showed the maximum power output at an intermediate solid oxide fuel cell temperature of 800°C. Finally, an optimal sputtering condition was reported for high performance Ni-GDC anodes. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=intermediate%20temperature%20solid%20oxide%20fuel%20cells" title="intermediate temperature solid oxide fuel cells">intermediate temperature solid oxide fuel cells</a>, <a href="https://publications.waset.org/abstracts/search?q=nickel-cermet%20anodic%20thin%20films" title=" nickel-cermet anodic thin films"> nickel-cermet anodic thin films</a>, <a href="https://publications.waset.org/abstracts/search?q=nyquist%20plots" title=" nyquist plots"> nyquist plots</a>, <a href="https://publications.waset.org/abstracts/search?q=radio%20frequency%20sputtering" title=" radio frequency sputtering"> radio frequency sputtering</a> </p> <a href="https://publications.waset.org/abstracts/55624/optimal-sputtering-conditions-for-nickel-cermet-anodes-in-intermediate-temperature-solid-oxide-fuel-cells" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/55624.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">240</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">98</span> A Nanoindentation Study of Thin Film Prepared by Physical Vapor Deposition</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Dhiflaoui%20Hafedh">Dhiflaoui Hafedh</a>, <a href="https://publications.waset.org/abstracts/search?q=Khlifi%20Kaouther"> Khlifi Kaouther</a>, <a href="https://publications.waset.org/abstracts/search?q=Ben%20Cheikh%20Larbi%20Ahmed"> Ben Cheikh Larbi Ahmed</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Monolayer and multilayer coatings of CrN and AlCrN deposited on 100Cr6 (AISI 52100) substrate by PVD magnetron sputtering system. The micro structures of the coatings were characterized using atomic force microscopy (AFM). The AFM analysis revealed the presence of domes and craters which are uniformly distributed over all surfaces of the various layers. Nano indentation measurement of CrN coating showed maximum hardness (H) and modulus (E) of 14 GPa and 240 GPa, respectively. The measured H and E values of AlCrN coatings were found to be 30 GPa and 382 GPa, respectively. The improved hardness in both the coatings was attributed mainly to a reduction in crystallite size and decrease in surface roughness. The incorporation of Al into the CrN coatings has improved both hardness and Young’s modulus. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=CrN" title="CrN">CrN</a>, <a href="https://publications.waset.org/abstracts/search?q=AlCrN%20coatings" title=" AlCrN coatings"> AlCrN coatings</a>, <a href="https://publications.waset.org/abstracts/search?q=hardness" title=" hardness"> hardness</a>, <a href="https://publications.waset.org/abstracts/search?q=nanoindentation" title=" nanoindentation"> nanoindentation</a> </p> <a href="https://publications.waset.org/abstracts/21853/a-nanoindentation-study-of-thin-film-prepared-by-physical-vapor-deposition" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/21853.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">557</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">97</span> Tribological Characterization of ZrN Coatings on Titanium Modified Austenitic Stainless Steel</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Farooq%20Wani">Mohammad Farooq Wani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Tribological characterization of ZrN coatings deposited on titanium modified austenitic stainless steel (alloy D-9) substrates has been investigated. The coatings were deposited in the deposition temperature range 300–873 K, using the pulsed magnetron sputtering technique. Scratch adhesion tests were carried out using Rc indenter under various conditions of load. Detailed tribological studies were conducted to understand the friction and wear behaviour of these coatings. For all tribological studies steel and ceramic balls were used as counter face material. 3D-Surface profiles of all wear tracks was carried out using 3D universal profiler. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ZrN" title="ZrN">ZrN</a>, <a href="https://publications.waset.org/abstracts/search?q=Surafce%20coating" title=" Surafce coating"> Surafce coating</a>, <a href="https://publications.waset.org/abstracts/search?q=thin%20film" title=" thin film"> thin film</a>, <a href="https://publications.waset.org/abstracts/search?q=tribology" title=" tribology"> tribology</a>, <a href="https://publications.waset.org/abstracts/search?q=friction%20and%20wear" title=" friction and wear "> friction and wear </a> </p> <a href="https://publications.waset.org/abstracts/15939/tribological-characterization-of-zrn-coatings-on-titanium-modified-austenitic-stainless-steel" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/15939.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">429</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">96</span> Temperature Dependent Magneto-Transport Properties of MnAl Binary Alloy Thin Films</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Vineet%20Barwal">Vineet Barwal</a>, <a href="https://publications.waset.org/abstracts/search?q=Sajid%20Husain"> Sajid Husain</a>, <a href="https://publications.waset.org/abstracts/search?q=Nanhe%20Kumar%20Gupta"> Nanhe Kumar Gupta</a>, <a href="https://publications.waset.org/abstracts/search?q=Soumyarup%20Hait"> Soumyarup Hait</a>, <a href="https://publications.waset.org/abstracts/search?q=Sujeet%20Chaudhary"> Sujeet Chaudhary</a> </p> <p class="card-text"><strong>Abstract:</strong></p> High perpendicular magnetic anisotropy (PMA) and low damping constant (α) in ferromagnets are one of the few necessary requirements for their potential applications in the field of spintronics. In this regards, ferromagnetic τ-phase of MnAl possesses the highest PMA (Ku > 107 erg/cc) at room temperature, high saturation magnetization (Ms~800 emu/cc) and a Curie temperature of ~395K. In this work, we have investigated the magnetotransport behaviour of this potentially useful binary system MnₓAl₁₋ₓ films were synthesized by co-sputtering (pulsed DC magnetron sputtering) on Si/SiO₂ (where SiO₂ is native oxide layer) substrate using 99.99% pure Mn and Al sputtering targets. Films of constant thickness (~25 nm) were deposited at the different growth temperature (Tₛ) viz. 30, 300, 400, 500, and 600 ºC with a deposition rate of ~5 nm/min. Prior to deposition, the chamber was pumped down to a base pressure of 2×10⁻⁷ Torr. During sputtering, the chamber was maintained at a pressure of 3.5×10⁻³ Torr with the 55 sccm Ar flow rate. Films were not capped for the purpose of electronic transport measurement, which leaves a possibility of metal oxide formation on the surface of MnAl (both Mn and Al have an affinity towards oxide formation). In-plane and out-of-plane transverse magnetoresistance (MR) measurements on films sputtered under optimized growth conditions revealed non-saturating behavior with MR values ~6% and 40% at 9T, respectively at 275 K. Resistivity shows a parabolic dependence on the field H, when the H is weak. At higher H, non-saturating positive MR that increases exponentially with the strength of magnetic field is observed, a typical character of hopping type conduction mechanism. An anomalous decrease in MR is observed on lowering the temperature. From the temperature dependence of reistivity, it is inferred that the two competing states are metallic and semiconducting, respectively and the energy scale of the phenomenon produces the most interesting effects, i.e., the metal-insulator transition and hence the maximum sensitivity to external fields, at room temperature. Theory of disordered 3D systems effectively explains the crossover temperature coefficient of resistivity from positive to negative with lowering of temperature. These preliminary findings on the MR behavior of MnAl thin films will be presented in detail. The anomalous large MR in mixed phase MnAl system is evidently useful for future spintronic applications. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=magnetoresistance" title="magnetoresistance">magnetoresistance</a>, <a href="https://publications.waset.org/abstracts/search?q=perpendicular%20magnetic%20anisotropy" title=" perpendicular magnetic anisotropy"> perpendicular magnetic anisotropy</a>, <a href="https://publications.waset.org/abstracts/search?q=spintronics" title=" spintronics"> spintronics</a>, <a href="https://publications.waset.org/abstracts/search?q=thin%20films" title=" thin films"> thin films</a> </p> <a href="https://publications.waset.org/abstracts/96012/temperature-dependent-magneto-transport-properties-of-mnal-binary-alloy-thin-films" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/96012.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">124</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">95</span> Microstructure and Mechanical Properties of Nb: Si: (a-C) Thin Films Prepared Using Balanced Magnetron Sputtering System</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sara%20Khamseh">Sara Khamseh</a>, <a href="https://publications.waset.org/abstracts/search?q=Elahe%20Sharifi"> Elahe Sharifi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> 321 alloy steel is austenitic stainless steel with high oxidation resistance and is commonly used to fabricate heat exchangers and steam generators. However, the low hardness and weak tribological performance can cause dangerous failures during industrial operations. The well-designed protective coatings on 321 alloy steel surfaces with high hardness and good tribological performance can guarantee their safe applications. The surface protection of metal substrates using protective coatings showed high efficiency in prevailing these problems. Carbon-based multicomponent coatings, such as metal-added amorphous carbon coatings, are crucially necessary because of their remarkable mechanical and tribological performances. In the current study, (Nb: Si: a-C) multicomponent coatings (a-C: amorphous carbon) were coated on 321 alloys using a balanced magnetron (BM) sputtering system at room temperature. The effects of the Si/Nb ratio on microstructure, mechanical and tribological characteristics of (Nb: Si: a-C) composite coatings were investigated. The XRD and Raman analysis results showed that the coatings formed a composite structure of cubic diamond (C-D), NbC, and graphite-like carbon (GLC). The NbC phase's abundance decreased when the C-D phase's affluence increased with an increasing Si/Nb ratio. The coatings' indentation hardness and plasticity index (H³/E² ratio) increased with an increasing Si/Nb ratio. The better mechanical properties of the coatings with higher Si content can be attributed to the higher cubic diamond (C-D) content. The cubic diamond (C-D) is a challenging phase and can positively affect the mechanical performance of the coatings. It is well documented that in hard protective coatings, Si encourages amorphization. In addition, THE studies showed that Nb and Mo can act as a catalyst for nucleation and growth of hard cubic (C-D) and hexagonal (H-D) diamond phases in a-C coatings. In the current study, it seems that fully arranged nanocomposite coatings contain hard C-D and NbC phases that embedded in the amorphous carbon (GLC) phase is formed. This unique structure decreased grain boundary density and defects and resulted in high hardness and H³/E² ratio. Moreover, the COF and wear rate of the coatings decreased with increasing Si/Nb ratio. This can be attributed to the good mechanical properties of the coatings and the formation of graphite-like carbon (GLC) structure with lamellae arrangement in the coatings. The complex and self-lubricant coatings are successfully formed on the surface of 321 alloys. The results of the present study clarified that Si addition to (Nb: a-C) coatings improve the mechanical and tribological performance of the coatings on 321 alloy. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=COF" title="COF">COF</a>, <a href="https://publications.waset.org/abstracts/search?q=mechanical%20properties" title=" mechanical properties"> mechanical properties</a>, <a href="https://publications.waset.org/abstracts/search?q=microstructure" title=" microstructure"> microstructure</a>, <a href="https://publications.waset.org/abstracts/search?q=%28Nb%3A%20Si%3A%20a-C%29%20coatings" title=" (Nb: Si: a-C) coatings"> (Nb: Si: a-C) coatings</a>, <a href="https://publications.waset.org/abstracts/search?q=Wear%20rate" title=" Wear rate"> Wear rate</a> </p> <a href="https://publications.waset.org/abstracts/163283/microstructure-and-mechanical-properties-of-nb-si-a-c-thin-films-prepared-using-balanced-magnetron-sputtering-system" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/163283.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">90</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">94</span> Structure and Tribological Properties of Moisture Insensitivity Si Containing Diamond-Like Carbon Film</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mingjiang%20Dai">Mingjiang Dai</a>, <a href="https://publications.waset.org/abstracts/search?q=Qian%20Shi"> Qian Shi</a>, <a href="https://publications.waset.org/abstracts/search?q=Fang%20Hu"> Fang Hu</a>, <a href="https://publications.waset.org/abstracts/search?q=Songsheng%20Lin"> Songsheng Lin</a>, <a href="https://publications.waset.org/abstracts/search?q=Huijun%20Hou"> Huijun Hou</a>, <a href="https://publications.waset.org/abstracts/search?q=Chunbei%20Wei"> Chunbei Wei</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A diamond-like carbon (DLC) is considered as a promising protective film since its high hardness and excellent tribological properties. However, DLC films are very sensitive to the environmental condition, its friction coefficient could dramatic change in high humidity, therefore, limited their further application in aerospace, the watch industry, and micro/nano-electromechanical systems. Therefore, most studies focus on the low friction coefficient of DLC films at a high humid environment. However, this is out of satisfied in practical application. An important thing was ignored is that the DLC coated components are usually used in the diversed environment, which means its friction coefficient may evidently change in different humid condition. As a result, the invalidation of DLC coated components or even sometimes disaster occurred. For example, DLC coated minisize gears were used in the watch industry, and the customer may frequently transform their locations with different weather and humidity even in one day. If friction coefficient is not stable in dry and high moisture conditions, the watch will be inaccurate. Thus, it is necessary to investigate the stable tribological behavior of DLC films in various environments. In this study, a-C:H:Si films were deposited by multi-function magnetron sputtering system, containing one ion source device and a pair of SiC dual mid-frequent targets and two direct current Ti/C targets. Hydrogenated carbon layers were manufactured by sputtering the graphite target in argon and methane gasses. The silicon was doped in DLC coatings by sputtering silicon carbide targets and the doping content were adjusted by mid-frequent sputtering current. The microstructure of the film was characterized by Raman spectrometry, X-ray photoelectron spectroscopy, and transmission electron microscopy while its friction behavior under different humidity conditions was studied using a ball-on-disc tribometer. The a-C:H films with Si content from 0 to 17at.% were obtained and the influence of Si content on the structure and tribological properties under the relative humidity of 50% and 85% were investigated. Results show that the a-C:H:Si film has typical diamond-like characteristics, in which Si mainly existed in the form of Si, SiC, and SiO2. As expected, the friction coefficient of a-C:H films can be effectively changed after Si doping, from 0.302 to 0.176 in RH 50%. The further test shows that the friction coefficient value of a-C:H:Si film in RH 85% is first increase and then decrease as a function of Si content. We found that the a-C:H:Si films with a Si content of 3.75 at.% show a stable friction coefficient of 0.13 in different humidity environment. It is suggestion that the sp3/sp2 ratio of a-C:H films with 3.75 at.% Si was higher than others, which tend to form the silica-gel-like sacrificial layers during friction tests. Therefore, the films deliver stable low friction coefficient under controlled RH value of 50 and 85%. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=diamond-like%20carbon" title="diamond-like carbon">diamond-like carbon</a>, <a href="https://publications.waset.org/abstracts/search?q=Si%20doping" title=" Si doping"> Si doping</a>, <a href="https://publications.waset.org/abstracts/search?q=moisture%20environment" title=" moisture environment"> moisture environment</a>, <a href="https://publications.waset.org/abstracts/search?q=table%20low%20friction%20coefficient" title=" table low friction coefficient"> table low friction coefficient</a> </p> <a href="https://publications.waset.org/abstracts/28775/structure-and-tribological-properties-of-moisture-insensitivity-si-containing-diamond-like-carbon-film" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/28775.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">364</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">93</span> Research on High Dielectric HfO₂ Stack Structure Applied to Field Effect Transistors</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kuan%20Yu%20Lin">Kuan Yu Lin</a>, <a href="https://publications.waset.org/abstracts/search?q=Shih%20Chih%20Chen"> Shih Chih Chen</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study focuses on the Al/HfO₂/Si/Al structure to explore the electrical properties of the structure. This experiment uses a radio frequency magnetron sputtering system to deposit high dielectric materials on p-type silicon substrates of 1~10 Ω-cm (100). Consider the hafnium dioxide film as a dielectric layer. Post-deposition annealing at 750°C in nitrogen atmosphere. Electron beam evaporation of metallic aluminum is then used to complete the top/bottom electrodes. The metal is post-annealed at 450°C for 20 minutes in a nitrogen environment to complete the MOS component. Its dielectric constant, equivalent oxide layer thickness, oxide layer defects, and leakage current mechanism are discussed. At PDA 750°C-5s, the maximum k value was found to be 21.2, and the EOT was 3.68nm. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=high-k%20gate%20dielectrics" title="high-k gate dielectrics">high-k gate dielectrics</a>, <a href="https://publications.waset.org/abstracts/search?q=HfO%E2%82%82" title=" HfO₂"> HfO₂</a>, <a href="https://publications.waset.org/abstracts/search?q=post%20deposition%20annealing" title=" post deposition annealing"> post deposition annealing</a>, <a href="https://publications.waset.org/abstracts/search?q=RF%20magnetic" title=" RF magnetic"> RF magnetic</a> </p> <a href="https://publications.waset.org/abstracts/183310/research-on-high-dielectric-hfo2-stack-structure-applied-to-field-effect-transistors" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/183310.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">58</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">92</span> One Dimensional Magneto-Plasmonic Structure Based On Metallic Nano-Grating</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20M.%20Hamidi">S. M. Hamidi</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Zamani"> M. Zamani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Magneto-plasmonic (MP) structures have turned into essential tools for the amplification of magneto-optical (MO) responses via the combination of MO activity and surface Plasmon resonance (SPR). Both the plasmonic and the MO properties of the resulting MP structure become interrelated because the SPR of the metallic medium. This interconnection can be modified the wave vector of surface plasmon polariton (SPP) in MP multilayer [1] or enhanced the MO activity [2- 3] and also modified the sensor responses [4]. There are several types of MP structures which are studied to enhance MO response in miniaturized configuration. In this paper, we propose a new MP structure based on the nano-metal grating and we investigate the MO and optical properties of this new structure. Our new MP structure fabricate by DC magnetron sputtering method and our home made MO experimental setup use for characterization of the structure. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Magneto-plasmonic%20structures" title="Magneto-plasmonic structures">Magneto-plasmonic structures</a>, <a href="https://publications.waset.org/abstracts/search?q=magneto-optical%20effect" title=" magneto-optical effect"> magneto-optical effect</a>, <a href="https://publications.waset.org/abstracts/search?q=nano-garting" title=" nano-garting"> nano-garting</a> </p> <a href="https://publications.waset.org/abstracts/19371/one-dimensional-magneto-plasmonic-structure-based-on-metallic-nano-grating" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/19371.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">563</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">91</span> Structural Determination of Nanocrystalline Si Films Using Raman Spectroscopy and the Ellipsometry</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=K.%20Kefif">K. Kefif</a>, <a href="https://publications.waset.org/abstracts/search?q=Y.%20Bouizem"> Y. Bouizem</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Belfedal"> A. Belfedal</a>, <a href="https://publications.waset.org/abstracts/search?q=D.%20J.%20Sib"> D. J. Sib</a>, <a href="https://publications.waset.org/abstracts/search?q=K.%20Zellama"> K. Zellama</a>, <a href="https://publications.waset.org/abstracts/search?q=l.%20Chahed"> l. Chahed</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Hydrogenated microcrystalline silicon (μc-Si:H) thin films were prepared by radio frequency magnetron sputtering at relatively low growth temperatures (Ts=100 °C). The films grown on glass substrate in order to use the new generation of substrates sensitive to elevated temperatures. Raman spectroscopy was applied to investigate the effect of the argon gas diluted in hydrogen, on the structural properties and the evolution of the micro structure in the films. Raman peak position, intensity and line width were used to characterize the quality and the percentage of the crystallites in the films. The results of this investigation suggest the existence of a threshold dilution around a gas mixture of argon (40%) and hydrogen (60%) for which the crystallization occurs, even at low deposition temperatures. The difference between the amorphous and the crystallized structures is well confirmed by spectroscopic ellipsometry (SE) technique. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Silicon" title="Silicon">Silicon</a>, <a href="https://publications.waset.org/abstracts/search?q=Thin%20films" title=" Thin films"> Thin films</a>, <a href="https://publications.waset.org/abstracts/search?q=Structural%20properties" title=" Structural properties"> Structural properties</a>, <a href="https://publications.waset.org/abstracts/search?q=Raman%20spectroscopy" title=" Raman spectroscopy"> Raman spectroscopy</a>, <a href="https://publications.waset.org/abstracts/search?q=Ellipsometry" title=" Ellipsometry"> Ellipsometry</a> </p> <a href="https://publications.waset.org/abstracts/19270/structural-determination-of-nanocrystalline-si-films-using-raman-spectroscopy-and-the-ellipsometry" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/19270.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">305</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">90</span> Mechanical Behavior of PVD Single Layer and Multilayer under Indentation Tests</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=K.%20Kaouther">K. Kaouther</a>, <a href="https://publications.waset.org/abstracts/search?q=D.%20Hafedh"> D. Hafedh</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Ben%20Cheikh%20Larbi"> A. Ben Cheikh Larbi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Various structures and compositions thin films were deposited on 100C6 (AISI 52100) steel substrate by PVD magnetron sputtering system. The morphological proprieties were evaluated using an atomic force microscopy (AFM). Vickers microindentation tests were performed with a Shimadzu HMV-2000 hardness testing machine. Hardness measurement was carried out using Jonsson and Hogmark model. The results show that the coatings topography was dominated by domes and craters. Mechanical behavior and failure modes under microindentation were depending of coatings structure and composition. TiAlN multilayer showed exception in the microindentation resistance compared to TiN single layer and TiAlN/TiAlN nanolayer. Piled structure provides an increase of failure resistance and a decrease in cracks propagation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=PVD%20thin%20films" title="PVD thin films">PVD thin films</a>, <a href="https://publications.waset.org/abstracts/search?q=multilayer" title=" multilayer"> multilayer</a>, <a href="https://publications.waset.org/abstracts/search?q=microindentation" title=" microindentation"> microindentation</a>, <a href="https://publications.waset.org/abstracts/search?q=cracking" title=" cracking"> cracking</a>, <a href="https://publications.waset.org/abstracts/search?q=damage%20mechanisms" title=" damage mechanisms"> damage mechanisms</a> </p> <a href="https://publications.waset.org/abstracts/21806/mechanical-behavior-of-pvd-single-layer-and-multilayer-under-indentation-tests" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/21806.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">405</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">89</span> Ion Beam Sputtering Deposition of Inorganic-Fluoropolymer Nano-Coatings for Real-Life Applications</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Valentini">M. Valentini</a>, <a href="https://publications.waset.org/abstracts/search?q=D.%20Melisi"> D. Melisi</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20A.%20Nitti"> M. A. Nitti</a>, <a href="https://publications.waset.org/abstracts/search?q=R%20A.%20Picca"> R A. Picca</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20C.%20Sportelli"> M. C. Sportelli</a>, <a href="https://publications.waset.org/abstracts/search?q=E.%20Bonerba"> E. Bonerba</a>, <a href="https://publications.waset.org/abstracts/search?q=G.%20Casamassima"> G. Casamassima</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20Cioffi"> N. Cioffi</a>, <a href="https://publications.waset.org/abstracts/search?q=L.%20Sabbatini"> L. Sabbatini</a>, <a href="https://publications.waset.org/abstracts/search?q=G.%20Tantillo"> G. Tantillo</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Valentini"> A. Valentini </a> </p> <p class="card-text"><strong>Abstract:</strong></p> In recent years antimicrobial coatings are receiving increasing attention due to their high demand in medical applications as well as in healthcare and hygiene. Research and technology are constantly involved to develop advanced finishing which can provide bacteriostatic growth without compromising the other typical properties of a textile as durability and non-toxicity, just to cite a few. Here we report on the antimicrobial coatings obtained, at room temperature and without the use of solvents, by means of the ion beam co-sputtering technique of an Ag target and a polytetrafluoroethylene one. In particular, such method allows to conjugate the well-known antimicrobial action of silver with the anti-stain and water-repellent properties of the fluoropolymer. Moreover, different Ag nanoparticle loadings (φ) were prepared by tuning the material deposition conditions achieving a fine control on film thickness and their antimicrobial/anti-stain properties. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=antimicrobial" title="antimicrobial">antimicrobial</a>, <a href="https://publications.waset.org/abstracts/search?q=ion%20beam%20sputtering" title=" ion beam sputtering"> ion beam sputtering</a>, <a href="https://publications.waset.org/abstracts/search?q=nanocoatings" title=" nanocoatings"> nanocoatings</a>, <a href="https://publications.waset.org/abstracts/search?q=anti-stain" title=" anti-stain"> anti-stain</a> </p> <a href="https://publications.waset.org/abstracts/6457/ion-beam-sputtering-deposition-of-inorganic-fluoropolymer-nano-coatings-for-real-life-applications" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/6457.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">392</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">88</span> Discussion on Microstructural Changes Caused by Deposition Temperature of LZO Doped Mg Piezoelectric Films</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Cheng-Ying%20Li">Cheng-Ying Li</a>, <a href="https://publications.waset.org/abstracts/search?q=Sheng-Yuan%20Chu"> Sheng-Yuan Chu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This article deposited LZO-doped Mg piezoelectric thin films via RF sputtering and observed microstructure and electrical characteristics by varying the deposition temperature. The XRD analysis results indicate that LZO-doped Mg exhibits excellent (002) orientation, and there is no presence of ZnO(100), Influenced by the temperature's effect on the lattice constant, the (002) peak intensity increases with rising temperature. Finally, we conducted deformation intensity analysis on the films, revealing an over fourfold increase in deformation at a processing temperature of 500°C. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=RF%20sputtering" title="RF sputtering">RF sputtering</a>, <a href="https://publications.waset.org/abstracts/search?q=piezoelectricity" title=" piezoelectricity"> piezoelectricity</a>, <a href="https://publications.waset.org/abstracts/search?q=ZnO" title=" ZnO"> ZnO</a>, <a href="https://publications.waset.org/abstracts/search?q=Mg" title=" Mg"> Mg</a> </p> <a href="https://publications.waset.org/abstracts/186346/discussion-on-microstructural-changes-caused-by-deposition-temperature-of-lzo-doped-mg-piezoelectric-films" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/186346.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">41</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">87</span> Bifurcation and Chaos of the Memristor Circuit</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Wang%20Zhulin">Wang Zhulin</a>, <a href="https://publications.waset.org/abstracts/search?q=Min%20Fuhong"> Min Fuhong</a>, <a href="https://publications.waset.org/abstracts/search?q=Peng%20Guangya"> Peng Guangya</a>, <a href="https://publications.waset.org/abstracts/search?q=Wang%20Yaoda"> Wang Yaoda</a>, <a href="https://publications.waset.org/abstracts/search?q=Cao%20Yi"> Cao Yi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, a magnetron memristor model based on hyperbolic sine function is presented and the correctness proved by studying the trajectory of its voltage and current phase, and then a memristor chaotic system with the memristor model is presented. The phase trajectories and the bifurcation diagrams and Lyapunov exponent spectrum of the magnetron memristor system are plotted by numerical simulation, and the chaotic evolution with changing the parameters of the system is also given. The paper includes numerical simulations and mathematical model, which confirming that the system, has a wealth of dynamic behavior. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=memristor" title="memristor">memristor</a>, <a href="https://publications.waset.org/abstracts/search?q=chaotic%20circuit" title=" chaotic circuit"> chaotic circuit</a>, <a href="https://publications.waset.org/abstracts/search?q=dynamical%20behavior" title=" dynamical behavior"> dynamical behavior</a>, <a href="https://publications.waset.org/abstracts/search?q=chaotic%20system" title=" chaotic system"> chaotic system</a> </p> <a href="https://publications.waset.org/abstracts/50850/bifurcation-and-chaos-of-the-memristor-circuit" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/50850.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">503</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">86</span> High Efficiency Achievement by a New Heterojunction N-Zno:Al/P-Si Solar Cell </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20Bouloufa">A. Bouloufa</a>, <a href="https://publications.waset.org/abstracts/search?q=F.%20Khaled"> F. Khaled</a>, <a href="https://publications.waset.org/abstracts/search?q=K.%20Djessas"> K. Djessas</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents a new structure of solar cell based on p-type microcrystalline silicon as an absorber and n-type aluminum doped zinc oxide (ZnO:Al) transparent conductive oxide as an optical window. The ZnO:Al layer deposited by rf-magnetron sputtering at room temperature yields a low resistivity about 7,64.10-2Ω.cm and more than 85% mean optical transmittance in the VIS–NIR range, with an optical band gap of 3.3 eV. These excellent optical properties of this layer in combination with an optimal contact at the front surface result in a superior light trapping yielding to efficiencies about 20%. In order to improve efficiency, we have used a p+-µc-Si thin layer highly doped as a back surface field which minimizes significantly the impact of rear surface recombination velocity on voltage and current leading to a high efficiency of 24%. Optoelectronic parameters were determined using the current density-voltage (J-V) curve by means of a numerical simulation with Analysis of Microelectronic and Photonic Structures (AMPS-1D) device simulator. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=optical%20window" title="optical window">optical window</a>, <a href="https://publications.waset.org/abstracts/search?q=thin%20film" title=" thin film"> thin film</a>, <a href="https://publications.waset.org/abstracts/search?q=solar%20cell" title=" solar cell"> solar cell</a>, <a href="https://publications.waset.org/abstracts/search?q=efficiency" title=" efficiency"> efficiency</a> </p> <a href="https://publications.waset.org/abstracts/14184/high-efficiency-achievement-by-a-new-heterojunction-n-znoalp-si-solar-cell" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/14184.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">287</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">85</span> Investigation of VN/TiN Multilayer Coatings on AZ91D Mg Alloys</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Ertas">M. Ertas</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20C.%20Onel"> A. C. Onel</a>, <a href="https://publications.waset.org/abstracts/search?q=G.%20Ekinci"> G. Ekinci</a>, <a href="https://publications.waset.org/abstracts/search?q=B.%20Toydemir"> B. Toydemir</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Durdu"> S. Durdu</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Usta"> M. Usta</a>, <a href="https://publications.waset.org/abstracts/search?q=L.%20Colakerol%20Arslan"> L. Colakerol Arslan </a> </p> <p class="card-text"><strong>Abstract:</strong></p> To develop AZ91D magnesium alloys with improved properties, we have applied TiN and VN/TiN multilayer coatings using DC magnetron sputter technique. Coating structure, surface morphology, chemical bonding and corrosion resistance of coatings were analyzed by x-ray diffraction (XRD), scanning electron microscope (SEM), x-ray photoelectron spectroscopy (XPS), and tafel extrapolation method, respectively. XPS analysis reveal that VN overlayer reacts with oxygen at the VN/TiN interface and forms more stable TiN layer. Morphological investigations and the corrosion results show that VN/TiN multilayer thin film coatings are quite effective to optimize the corrosion resistance of Mg alloys. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=AZ91D%20Mg%20alloys" title="AZ91D Mg alloys">AZ91D Mg alloys</a>, <a href="https://publications.waset.org/abstracts/search?q=high%20corrosion%20resistance" title=" high corrosion resistance"> high corrosion resistance</a>, <a href="https://publications.waset.org/abstracts/search?q=transition%20metal%20nitride%20coatings" title=" transition metal nitride coatings"> transition metal nitride coatings</a>, <a href="https://publications.waset.org/abstracts/search?q=magnetron%20sputter" title=" magnetron sputter"> magnetron sputter</a> </p> <a href="https://publications.waset.org/abstracts/16465/investigation-of-vntin-multilayer-coatings-on-az91d-mg-alloys" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/16465.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">476</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">84</span> Studies on Radio Frequency Sputtered Copper Zinc Tin Sulphide Absorber Layers for Thin Film Solar Cells</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=G.%20Balaji">G. Balaji</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20Balasundaraprabhu"> R. Balasundaraprabhu</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Prasanna"> S. Prasanna</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20D.%20Kannan"> M. D. Kannan</a>, <a href="https://publications.waset.org/abstracts/search?q=K.%20Sivakumaran"> K. Sivakumaran</a>, <a href="https://publications.waset.org/abstracts/search?q=David%20Mcilroy"> David Mcilroy</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Copper Zin tin sulphide (Cu2ZnSnS4 or CZTS) is found to be better alternative to Copper Indium gallium diselenide as absorber layers in thin film based solar cells due to the utilisation of earth-abundant materials in the midst of lower toxicity. In the present study, Cu2ZnSnS4 thin films were prepared on soda lime glass using (CuS, ZnS, SnS) targets and were deposited by three different stacking orders, using RF Magnetron sputtering. The substrate temperature was fixed at 300 °C during the depositions. CZTS thin films were characterized using X-ray diffraction, X-ray photoelectron spectroscopy, Raman spectroscopy and UV-Vis-NIR spectroscopy. All the samples exhibited X-ray peaks pertaining to (112) kesterite phase of CZTS, along with the presence of a predominant wurtzite CZTS phase. X-ray photoelectron spectroscopy revealed the presence of all the elements in all the samples. The change in stacking order clearly shows that it affects the structural and phase properties of the films. Relative atomic concentrations of Zn, Cu, Sn and S, which are determined by high-resolution XPS core level spectra integrated peak areas revealed that the CZTS films exhibit inhomogeneity in both stoichiometry and elemental composition. Raman spectroscopy studies on the film showed the presence of CZTS phase. The energy band gap of the CZTS thin films was found to be in the range of 1.5 eV to 1.6 eV. The films were then annealed at 450 °C for 5 hrs and it was found that the predominant nature of the X-ray peaks has transformed from Wurtzite to Kesterite phase which is highly desirable for absorber layers in thin film solar cells. The optimized CZTS layer was used as an absorber layer in thin film solar cells. ZnS and CdS were used as buffer layers which in turn prepared by Hot wall epitaxy technique. Gallium doped Zinc oxide was used as a transparent conducting oxide. The solar cell structure Glass/Mo/CZTS/CdS or ZnS/GZO has been fabricated, and solar cell parameters were measured. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=earth-abundant" title="earth-abundant">earth-abundant</a>, <a href="https://publications.waset.org/abstracts/search?q=Kesterite" title=" Kesterite"> Kesterite</a>, <a href="https://publications.waset.org/abstracts/search?q=RF%20sputtering" title=" RF sputtering"> RF sputtering</a>, <a href="https://publications.waset.org/abstracts/search?q=thin%20film%20solar%20cells" title=" thin film solar cells"> thin film solar cells</a> </p> <a href="https://publications.waset.org/abstracts/71511/studies-on-radio-frequency-sputtered-copper-zinc-tin-sulphide-absorber-layers-for-thin-film-solar-cells" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/71511.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">280</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">83</span> Optical and Electrochromic Properties of All-Solid-State Electrochromic Device Consisting of Amorphous WO₃ and Ni(OH)₂</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ta-Huang%20Sun">Ta-Huang Sun</a>, <a href="https://publications.waset.org/abstracts/search?q=Ming-Hao%20Hsieh"> Ming-Hao Hsieh</a>, <a href="https://publications.waset.org/abstracts/search?q=Min-Chuan%20Wang"> Min-Chuan Wang</a>, <a href="https://publications.waset.org/abstracts/search?q=Der-Jun%20Jan"> Der-Jun Jan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Electrochromism refers to the persistent and reversible change of optical properties by an applied voltage pulse. There are many transition metal oxides exhibiting electrochromism, e.g. oxides of W, Ni, Ir, V, Ti, Co and Mo. Organic materials especially some conducting polymers such as poly(aniline), poly(3, 4-propylene- dioxythiophene) also received much attention for electrochromic (EC) applications. Electrochromic materials attract considerable interest because of their potential applications, such as information displays, smart windows, variable reflectance mirrors, and variable-emittance thermal radiators. In this study, the EC characteristics are investigated on an all-solid-state EC device composed of a-WO₃ and Ni(OH)₂ with a Ta₂O₅ protective layer which is prepared by magnetron sputtering. It is found that the transmittance modulation increases with decreasing the film thickness of Ta₂O₅. On the other hand, the transmittance modulation is 57% as the Ni(OH)₂/ITO is prepared by the linear-sweep potential cycling of the sputter-deposited Ta₂O₅/NiO/ITO in a 0.5 M LiClO₄+H₂O electrolyte. However, when Ni(OH)₂/ITO is prepared by a 0.01 M HCl electrolyte, the transmittance modulation of EC device can be improved to 61%. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=electrochromic%20device" title="electrochromic device">electrochromic device</a>, <a href="https://publications.waset.org/abstracts/search?q=tungsten%20oxide" title=" tungsten oxide"> tungsten oxide</a>, <a href="https://publications.waset.org/abstracts/search?q=nickel" title=" nickel"> nickel</a>, <a href="https://publications.waset.org/abstracts/search?q=Ta%E2%82%82O%E2%82%85" title=" Ta₂O₅"> Ta₂O₅</a> </p> <a href="https://publications.waset.org/abstracts/52520/optical-and-electrochromic-properties-of-all-solid-state-electrochromic-device-consisting-of-amorphous-wo3-and-nioh2" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/52520.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">291</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">82</span> The Effect of the Deposition Parameters on the Microstructural and Optical Properties of Mn-Doped GeTe Chalcogenide Materials </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Adam%20Abdalla%20Elbashir%20Adam">Adam Abdalla Elbashir Adam</a>, <a href="https://publications.waset.org/abstracts/search?q=Xiaomin%20Cheng"> Xiaomin Cheng</a>, <a href="https://publications.waset.org/abstracts/search?q=Xiang%20Shui%20Miao"> Xiang Shui Miao </a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this work, the effect of the magnetron sputtering system parameters on the optical properties of the Mn doped GeTe were investigated. The optical properties of the Ge<sub>1-x</sub>Mn<sub>x</sub>Te thin films with different thicknesses are determined by analyzing the transmittance and reflectance data. The energy band gaps of the amorphous Mn-doped GeTe thin films with different thicknesses were calculated. The obtained results demonstrated that the energy band gap values of the amorphous films are quite different and they are dependent on the films thicknesses. The extinction coefficients of amorphous Mn-doped GeTe thin films as function of wavelength for different thicknesses were measured. The results showed that the extinction coefficients of all films are varying inversely with their optical transmission. Moreover, the results emphasis that, not only the microstructure, electrical and magnetic properties of Mn doped GeTe thin films vary with the films thicknesses but also the optical properties differ with the film thickness. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=phase%20change%20magnetic%20materials" title="phase change magnetic materials">phase change magnetic materials</a>, <a href="https://publications.waset.org/abstracts/search?q=transmittance" title=" transmittance"> transmittance</a>, <a href="https://publications.waset.org/abstracts/search?q=absorbance" title=" absorbance"> absorbance</a>, <a href="https://publications.waset.org/abstracts/search?q=extinction%20coefficients" title=" extinction coefficients"> extinction coefficients</a> </p> <a href="https://publications.waset.org/abstracts/48213/the-effect-of-the-deposition-parameters-on-the-microstructural-and-optical-properties-of-mn-doped-gete-chalcogenide-materials" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/48213.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">404</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">81</span> Reactive Sputter Deposition of Titanium Nitride on Silicon Using a Magnetized Sheet Plasma Source</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Janella%20Salamania">Janella Salamania</a>, <a href="https://publications.waset.org/abstracts/search?q=Marcedon%20Fernandez"> Marcedon Fernandez</a>, <a href="https://publications.waset.org/abstracts/search?q=Matthew%20Villanueva%20Henry%20Ramos"> Matthew Villanueva Henry Ramos</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Titanium nitrite (TiN) a popular functional and decorative coating because of its golden yellow color, high hardness and superior wear resistance. It is also being studied as a diffusion barrier in integrated circuits due to its known chemical stability and low resistivity. While there have been numerous deposition methods done for TiN, most required the heating of substrates at high temperatures. In this work, TiN films are deposited on silicon (111) and (100) substrates without substrate heating using a patented magnetized sheet plasma source. Films were successfully deposited without substrate heating at various target bias, while maintaining a constant 25% N2 to Ar ratio, and deposition of time of 30 minutes. The resulting films exhibited a golden yellow color which is characteristic of TiN. X-ray diffraction patterns show the formation of TiN predominantly oriented in the (111) direction regardless of substrate used. EDX data also confirms the 1:1 stoichiometry of titanium an nitrogen. Ellipsometry measurements estimate the thickness to range from 28 nm to 33 nm. SEM images were also taken to observe the morphology of the film. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=coatings" title="coatings">coatings</a>, <a href="https://publications.waset.org/abstracts/search?q=nitrides" title=" nitrides"> nitrides</a>, <a href="https://publications.waset.org/abstracts/search?q=coatings" title=" coatings"> coatings</a>, <a href="https://publications.waset.org/abstracts/search?q=reactive%20magnetron%20sputtering" title=" reactive magnetron sputtering"> reactive magnetron sputtering</a>, <a href="https://publications.waset.org/abstracts/search?q=thin%20films" title=" thin films"> thin films</a> </p> <a href="https://publications.waset.org/abstracts/29494/reactive-sputter-deposition-of-titanium-nitride-on-silicon-using-a-magnetized-sheet-plasma-source" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/29494.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">341</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">80</span> Impact of the Oxygen Content on the Optoelectronic Properties of the Indium-Tin-Oxide Based Transparent Electrodes for Silicon Heterojunction Solar Cells</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Brahim%20Aissa">Brahim Aissa</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Transparent conductive oxides (TCOs) used as front electrodes in solar cells must feature simultaneously high electrical conductivity, low contact resistance with the adjacent layers, and an appropriate refractive index for maximal light in-coupling into the device. However, these properties may conflict with each other, motivating thereby the search for TCOs with high performance. Additionally, due to the presence of temperature sensitive layers in many solar cell designs (for example, in thin-film silicon and silicon heterojunction (SHJ)), low-temperature deposition processes are more suitable. Several deposition techniques have been already explored to fabricate high-mobility TCOs at low temperatures, including sputter deposition, chemical vapor deposition, and atomic layer deposition. Among this variety of methods, to the best of our knowledge, magnetron sputtering deposition is the most established technique, despite the fact that it can lead to damage of underlying layers. The Sn doped In₂O₃ (ITO) is the most commonly used transparent electrode-contact in SHJ technology. In this work, we studied the properties of ITO thin films grown by RF sputtering. Using different oxygen fraction in the argon/oxygen plasma, we prepared ITO films deposited on glass substrates, on one hand, and on a-Si (p and n-types):H/intrinsic a-Si/glass substrates, on the other hand. Hall Effect measurements were systematically conducted together with total-transmittance (TT) and total-reflectance (TR) spectrometry. The electrical properties were drastically affected whereas the TT and TR were found to be slightly impacted by the oxygen variation. Furthermore, the time of flight-secondary ion mass spectrometry (TOF-SIMS) technique was used to determine the distribution of various species throughout the thickness of the ITO and at various interfaces. The depth profiling of indium, oxygen, tin, silicon, phosphorous, boron and hydrogen was investigated throughout the various thicknesses and interfaces, and obtained results are discussed accordingly. Finally, the extreme conditions were selected to fabricate rear emitter SHJ devices, and the photovoltaic performance was evaluated; the lower oxygen flow ratio was found to yield the best performance attributed to lower series resistance. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=solar%20cell" title="solar cell">solar cell</a>, <a href="https://publications.waset.org/abstracts/search?q=silicon%20heterojunction" title=" silicon heterojunction"> silicon heterojunction</a>, <a href="https://publications.waset.org/abstracts/search?q=oxygen%20content" title=" oxygen content"> oxygen content</a>, <a href="https://publications.waset.org/abstracts/search?q=optoelectronic%20properties" title=" optoelectronic properties"> optoelectronic properties</a> </p> <a href="https://publications.waset.org/abstracts/90133/impact-of-the-oxygen-content-on-the-optoelectronic-properties-of-the-indium-tin-oxide-based-transparent-electrodes-for-silicon-heterojunction-solar-cells" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/90133.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">159</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">79</span> Pulse Method for Investigation of Zr-C Phase Diagram at High Carbon Content Domain under High Temperatures</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Arseniy%20M.%20Kondratyev">Arseniy M. Kondratyev</a>, <a href="https://publications.waset.org/abstracts/search?q=Sergey%20V.%20Onufriev"> Sergey V. Onufriev</a>, <a href="https://publications.waset.org/abstracts/search?q=Alexander%20I.%20Savvatimskiy"> Alexander I. Savvatimskiy</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The microsecond electrical pulse heating technique which provides uniform energy input into an investigated specimen is considered. In the present study we investigated ZrC+C carbide specimens in a form of a thin layer (about 5 microns thick) that were produced using a method of magnetron sputtering on insulating substrates. Specimens contained (at. %): Zr–17.88; C–67.69; N–8.13; O–5.98. Current through the specimen, voltage drop across it and radiation at the wavelength of 856 nm were recorded in the experiments. It enabled us to calculate the input energy, specific heat (from 2300 to 4500 K) and resistivity (referred to the initial dimensions of a specimen). To obtain the true temperature a black body specimen was used. Temperature of the beginning and completion of a phase transition (solid–liquid) was measured.Temperature of the onset of melting was 3150 K at the input energy 2.65 kJ/g; temperature of the completion of melting was 3450 K at the input energy 5.2 kJ/g. The specific heat of the solid phase of investigated carbide calculated using our data on temperature and imparted energy, is close to 0.75 J/gК for temperature range 2100–2800 K. Our results are considered together with the equilibrium Zr-C phase diagram. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=pulse%20heating" title="pulse heating">pulse heating</a>, <a href="https://publications.waset.org/abstracts/search?q=zirconium%20carbide" title=" zirconium carbide"> zirconium carbide</a>, <a href="https://publications.waset.org/abstracts/search?q=high%20temperatures" title=" high temperatures"> high temperatures</a>, <a href="https://publications.waset.org/abstracts/search?q=melting" title=" melting"> melting</a> </p> <a href="https://publications.waset.org/abstracts/10561/pulse-method-for-investigation-of-zr-c-phase-diagram-at-high-carbon-content-domain-under-high-temperatures" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/10561.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">323</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">78</span> Influence of Thickness on Electrical and Structural Properties of Zinc Oxide (ZnO) Thin Films Prepared by RF Sputtering Technique</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Momoh">M. Momoh</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Abdullahi"> S. Abdullahi</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20U.%20Moreh"> A. U. Moreh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Zinc oxide (ZnO) thin films were prepared on corning (7059) glass substrates at a thickness of 75.5 and 130.5 nm by RF sputtering technique. The deposition was carried out at room temperature after which the samples were annealed in open air at 150°C. The electrical and structural properties of these films were studied. The electrical properties of the films were monitored by four-point probe method while the structural properties were studied by X-ray diffraction (XRD). It was found that the electrical resistance of the films decreases with increase in the thickness of the films. The XRD analysis of the films showed that the films have a peak located at 34.31°-34.35° with hkl (002). Other parameters calculated include the stress (σ) and the grain size (D). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=electrical%20properties" title="electrical properties">electrical properties</a>, <a href="https://publications.waset.org/abstracts/search?q=film%20thickness" title=" film thickness"> film thickness</a>, <a href="https://publications.waset.org/abstracts/search?q=structural%20properties" title=" structural properties"> structural properties</a>, <a href="https://publications.waset.org/abstracts/search?q=zinc%20oxide" title=" zinc oxide"> zinc oxide</a> </p> <a href="https://publications.waset.org/abstracts/10472/influence-of-thickness-on-electrical-and-structural-properties-of-zinc-oxide-zno-thin-films-prepared-by-rf-sputtering-technique" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/10472.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">378</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">77</span> Influence of Thickness on Optical Properties of ZnO Thin Films Prepared by Radio Frequency (RF) Sputtering Technique</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20Abdullahi">S. Abdullahi</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Momoh"> M. Momoh</a>, <a href="https://publications.waset.org/abstracts/search?q=K.%20U.%20Isah"> K. U. Isah</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Zinc oxide (ZnO) thin films of 75.5 nm and 130.5 nm were deposited at room temperature onto chemically and ultrasonically cleaned corning glass substrate by radio frequency technique and annealed at 150°C under nitrogen atmosphere for 60 minutes. The optical properties of the films were ascertained by UV-VIS-NIR spectrophotometry. Influence of the thickness of the films on the optical properties was studied keeping other deposition parameters constant. The optical transmittance spectra reveal a maximum transmittance of 81.49% and 84.26% respectively. The band gap of the films is found to be direct allowed transition and decreases with the increase in thickness of the films. The band gap energy (Eg) is in the range of 3.28 eV to 3.31 eV, respectively. These thin films are suitable for solar cell applications. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=optical%20constants" title="optical constants">optical constants</a>, <a href="https://publications.waset.org/abstracts/search?q=RF%20sputtering" title=" RF sputtering"> RF sputtering</a>, <a href="https://publications.waset.org/abstracts/search?q=Urbach%20energy" title=" Urbach energy"> Urbach energy</a>, <a href="https://publications.waset.org/abstracts/search?q=zinc%20oxide%20thin%20film" title=" zinc oxide thin film"> zinc oxide thin film</a> </p> <a href="https://publications.waset.org/abstracts/10863/influence-of-thickness-on-optical-properties-of-zno-thin-films-prepared-by-radio-frequency-rf-sputtering-technique" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/10863.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">457</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">76</span> Structural and Optical Properties of RF-Sputtered ZnS and Zn(S,O) Thin Films</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ould%20Mohamed%20Cheikh">Ould Mohamed Cheikh</a>, <a href="https://publications.waset.org/abstracts/search?q=Mounir%20Chaik"> Mounir Chaik</a>, <a href="https://publications.waset.org/abstracts/search?q=Hind%20El%20Aakib"> Hind El Aakib</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Aggour"> Mohamed Aggour</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdelkader%20Outzourhit"> Abdelkader Outzourhit</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Zinc sulfide [ZnS] and oxygenated zinc sulfide Zn(O,S) thin films were deposited on glass substrates, by reactive cathodic radio-frequency (RF) sputtering. The substrates power and percentage of oxygen were varied in the range of 100W to 250W and from 5% to 20% respectively. The structural, morphological and optical properties of these thin films were investigated. The optical properties (mainly the refractive index, absorption coefficient and optical band gap) were examined by optical transmission measurements in the ultraviolet-visible-near Infrared wavelength range. XRD analysis indicated that all sputtered ZnS films were a single phase with a preferential orientation along the (111) plane of zinc blend (ZB). The crystallite size was in the range of 19.5 nm to 48.5 nm, the crystallite size varied with RF power reaching a maximum at 200 W. The Zn(O,S) films, on the other hand, were amorphous. UV-Visible, measurements showed that the ZnS film had more than 80% transmittance in the visible wavelength region while that of Zn(O,S is 85%. Moreover, it was observed that the band gap energy of the ZnS films increases slightly from 3.4 to 3.52 eV as the RF power was increased. The optical band gap of Zn(O,S), on the other hand, decreased from 4.2 to 3.89 eV as the oxygen partial pressure is increased in the sputtering atmosphere at a fixed RF-power. Scanning electron microscopy observations revealed smooth surfaces for both type of films. The X-ray reflectometry measurements on the ZnS films showed that the density of the films (3.9 g/cm3) is close that of bulk ZnS. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=thin%20films%20Zn%28O" title="thin films Zn(O">thin films Zn(O</a>, <a href="https://publications.waset.org/abstracts/search?q=S%29%20properties" title="S) properties">S) properties</a>, <a href="https://publications.waset.org/abstracts/search?q=Zn%28O" title=" Zn(O"> Zn(O</a>, <a href="https://publications.waset.org/abstracts/search?q=S%29%20by%20Rf-sputtering" title="S) by Rf-sputtering">S) by Rf-sputtering</a>, <a href="https://publications.waset.org/abstracts/search?q=ZnS%20for%20solar%20cells" title=" ZnS for solar cells"> ZnS for solar cells</a>, <a href="https://publications.waset.org/abstracts/search?q=thin%20films%20for%20renewable%20energy" title=" thin films for renewable energy"> thin films for renewable energy</a> </p> <a href="https://publications.waset.org/abstracts/66128/structural-and-optical-properties-of-rf-sputtered-zns-and-znso-thin-films" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/66128.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">282</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">75</span> The Creation of Calcium Phosphate Coating on Nitinol Substrate</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kirill%20M.%20Dubovikov">Kirill M. Dubovikov</a>, <a href="https://publications.waset.org/abstracts/search?q=Ekaterina%20S.%20Marchenko"> Ekaterina S. Marchenko</a>, <a href="https://publications.waset.org/abstracts/search?q=Gulsharat%20A.%20Baigonakova"> Gulsharat A. Baigonakova</a> </p> <p class="card-text"><strong>Abstract:</strong></p> NiTi alloys are widely used as implants in medicine due to their unique properties such as superelasticity, shape memory effect and biocompatibility. However, despite these properties, one of the major problems is the release of nickel after prolonged use in the human body under dynamic stress. This occurs due to oxidation and cracking of NiTi implants, which provokes nickel segregation from the matrix to the surface and release into living tissues. As we know, nickel is a toxic element and can cause cancer, allergies, etc. One of the most popular ways to solve this problem is to create a corrosion resistant coating on NiTi. There are many coatings of this type, but not all of them have good biocompatibility, which is very important for medical implants. Coatings based on calcium phosphate phases have excellent biocompatibility because Ca and P are the main constituents of the mineral part of human bone. This fact suggests that a Ca-P coating on NiTi can enhance osteogenesis and accelerate the healing process. Therefore, the aim of this study is to investigate the structure of Ca-P coating on NiTi substrate. Plasma assisted radio frequency (RF) sputtering was used to obtain this film. This method was chosen because it allows the crystallinity and morphology of the Ca-P coating to be controlled by the sputtering parameters. It allows us to obtain three different NiTi samples with Ca-P coating. XRD, AFM, SEM and EDS were used to study the composition, structure and morphology of the coating phase. Scratch tests were carried out to evaluate the adhesion of the coating to the substrate. Wettability tests were used to investigate the hydrophilicity of the different coatings and to suggest which of them had better biocompatibility. XRD showed that the coatings of all samples were hydroxyapatite, but the matrix was represented by TiNi intermetallic compounds such as B2, Ti2Ni and Ni3Ti. The SEM shows that the densest and defect-free coating has only one sample after three hours of sputtering. Wettability tests show that the sample with the densest coating has the lowest contact angle of 40.2° and the largest free surface area of 57.17 mJ/m2, which is mostly disperse. A scratch test was carried out to investigate the adhesion of the coating to the surface and it was shown that all coatings were removed by a cohesive mechanism. However, at a load of 30N, the indenter reached the substrate in two out of three samples, except for the sample with the densest coating. It was concluded that the most promising sputtering mode was the third, which consisted of three hours of deposition. This mode produced a defect-free Ca-P coating with good wettability and adhesion. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=biocompatibility" title="biocompatibility">biocompatibility</a>, <a href="https://publications.waset.org/abstracts/search?q=calcium%20phosphate%20coating" title=" calcium phosphate coating"> calcium phosphate coating</a>, <a href="https://publications.waset.org/abstracts/search?q=NiTi%20alloy" title=" NiTi alloy"> NiTi alloy</a>, <a href="https://publications.waset.org/abstracts/search?q=radio%20frequency%20sputtering." title=" radio frequency sputtering."> radio frequency sputtering.</a> </p> <a href="https://publications.waset.org/abstracts/172096/the-creation-of-calcium-phosphate-coating-on-nitinol-substrate" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/172096.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">72</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">74</span> Fabrication and Characterization of Al2O3 Based Electrical Insulation Coatings Around SiC Fibers</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20Palaniyappan">S. Palaniyappan</a>, <a href="https://publications.waset.org/abstracts/search?q=P.%20K.%20Chennam"> P. K. Chennam</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Trautmann"> M. Trautmann</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20Ahmad"> H. Ahmad</a>, <a href="https://publications.waset.org/abstracts/search?q=T.%20Mehner"> T. Mehner</a>, <a href="https://publications.waset.org/abstracts/search?q=T.%20Lampke"> T. Lampke</a>, <a href="https://publications.waset.org/abstracts/search?q=G.%20Wagner"> G. Wagner</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In structural-health monitoring of fiber reinforced plastics (FRPs), every single inorganic fiber sensor that are integrated into the bulk material requires an electrical insulation around itself, when the surrounding reinforcing fibers are electrically conductive. This results in a more accurate data acquisition only from the sensor fiber without any electrical interventions. For this purpose, thin nano-films of aluminium oxide (Al<sub>2</sub>O<sub>3</sub>)-based electrical-insulation coatings have been fabricated around the Silicon Carbide (SiC) single fiber sensors through reactive DC magnetron sputtering technique. The sputtered coatings were amorphous in nature and the thickness of the coatings increased with an increase in the sputter time. Microstructural characterization of the coated fibers performed using scanning electron microscopy (SEM) confirmed a homogeneous circumferential coating with no detectable defects or cracks on the surface. X-ray diffraction (XRD) analyses of the as-sputtered and 2 hours annealed coatings (825 & 1125 ˚C) revealed the amorphous and crystalline phases of Al<sub>2</sub>O<sub>3</sub> respectively. Raman spectroscopic analyses produced no characteristic bands of Al<sub>2</sub>O<sub>3</sub>, as the thickness of the films was in the nanometer (nm) range, which is too small to overcome the actual penetration depth of the laser used. In addition, the influence of the insulation coatings on the mechanical properties of the SiC sensor fibers has been analyzed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Al%E2%82%82O%E2%82%83%20thin%20film" title="Al₂O₃ thin film">Al₂O₃ thin film</a>, <a href="https://publications.waset.org/abstracts/search?q=electrical%20insulation%20coating" title=" electrical insulation coating"> electrical insulation coating</a>, <a href="https://publications.waset.org/abstracts/search?q=PVD%20process" title=" PVD process"> PVD process</a>, <a href="https://publications.waset.org/abstracts/search?q=SiC%20fibre" title=" SiC fibre"> SiC fibre</a>, <a href="https://publications.waset.org/abstracts/search?q=single%20fibre%20tensile%20test" title=" single fibre tensile test"> single fibre tensile test</a> </p> <a href="https://publications.waset.org/abstracts/97128/fabrication-and-characterization-of-al2o3-based-electrical-insulation-coatings-around-sic-fibers" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/97128.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">123</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">73</span> Effect of Plasma Treatment on UV Protection Properties of Fabrics</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sheila%20Shahidi">Sheila Shahidi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> UV protection by fabrics has recently become a focus of great interest, particularly in connection with environmental degradation or ozone layer depletion. Fabrics provide simple and convenient protection against UV radiation (UVR), but not all fabrics offer sufficient UV protection. To describe the degree of UVR protection offered by clothing materials, the ultraviolet protection factor (UPF) is commonly used. UV-protective fabric can be generated by application of a chemical finish using normal wet-processing methodologies. However, traditional wet-processing techniques are known to consume large quantities of water and energy and may lead to adverse alterations of the bulk properties of the substrate. Recently, usage of plasmas to generate physicochemical surface modifications of textile substrates has become an intriguing approach to replace or enhance conventional wet-processing techniques. In this research work the effect of plasma treatment on UV protection properties of fabrics was investigated. DC magnetron sputtering was used and the parameters of plasma such as gas type, electrodes, time of exposure, power and, etc. were studied. The morphological and chemical properties of samples were analyzed using Scanning Electron Microscope (SEM) and Furrier Transform Infrared Spectroscopy (FTIR), respectively. The transmittance and UPF values of the original and plasma-treated samples were measured using a Shimadzu UV3101 PC (UV–Vis–NIR scanning spectrophotometer, 190–2, 100 nm range). It was concluded that, plasma which is an echo-friendly, cost effective and dry technique is being used in different branches of the industries, and will conquer textile industry in the near future. Also it is promising method for preparation of UV protection textile. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fabric" title="fabric">fabric</a>, <a href="https://publications.waset.org/abstracts/search?q=plasma" title=" plasma"> plasma</a>, <a href="https://publications.waset.org/abstracts/search?q=textile" title=" textile"> textile</a>, <a href="https://publications.waset.org/abstracts/search?q=UV%20protection" title=" UV protection "> UV protection </a> </p> <a href="https://publications.waset.org/abstracts/28919/effect-of-plasma-treatment-on-uv-protection-properties-of-fabrics" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/28919.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">519</span> </span> </div> </div> <ul class="pagination"> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=magnetron%20sputtering&page=1" rel="prev">&lsaquo;</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=magnetron%20sputtering&page=1">1</a></li> <li class="page-item active"><span class="page-link">2</span></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=magnetron%20sputtering&page=3">3</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=magnetron%20sputtering&page=4">4</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=magnetron%20sputtering&page=5">5</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=magnetron%20sputtering&page=3" rel="next">&rsaquo;</a></li> </ul> </div> </main> <footer> <div id="infolinks" 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