Search results for: A. Sichinava

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Sichinava</title> <meta name="description" content="Search results for: A. Sichinava"> <meta name="keywords" content="A. Sichinava"> <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 navbar-toggler ml-auto" type="button" data-toggle="collapse" data-target="#navbarMenu" aria-controls="navbarMenu" aria-expanded="false" aria-label="Toggle navigation"> <span class="navbar-toggler-icon"></span> </button> <div class="w-100"> <div class="d-none d-lg-flex flex-row-reverse"> <form method="get" action="https://waset.org/search" class="form-inline my-2 my-lg-0"> <input class="form-control mr-sm-2" type="search" placeholder="Search Conferences" value="A. 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Sichinava"> <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> 2</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: A. Sichinava</h1> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2</span> Influence of Boron Doping and Thermal Treatment on Internal Friction of Monocrystalline Si1-xGex(x≤0,02) Alloys</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=I.%20Kurashvili">I. Kurashvili</a>, <a href="https://publications.waset.org/search?q=G.%20Darsavelidze"> G. Darsavelidze</a>, <a href="https://publications.waset.org/search?q=G.%20Bokuchava"> G. Bokuchava</a>, <a href="https://publications.waset.org/search?q=A.%20Sichinava"> A. Sichinava</a>, <a href="https://publications.waset.org/search?q=I.%20Tabatadze"> I. Tabatadze </a> </p> <p class="card-text"><strong>Abstract:</strong></p> <p>The impact of boron doping on the internal friction (IF) and shear modulus temperature spectra of Si<sub>1-x</sub>Ge<sub>x</sub>(x≤0,02) monocrsytals has been investigated by reverse torsional pendulum oscillations characteristics testing. At room temperatures, microhardness and indentation modulus of the same specimens have been measured by dynamic ultra microhardness tester. It is shown that boron doping causes two kinds effect: At low boron concentration (~10<sup>15 </sup>cm<sup>-3</sup>) significant strengthening is revealed, while at the high boron concentration (~10<sup>19 </sup>cm<sup>-3</sup>) strengthening effect and activation characteristics of relaxation origin IF processes are reduced.</p> <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=Dislocation" title="Dislocation">Dislocation</a>, <a href="https://publications.waset.org/search?q=internal%20friction" title=" internal friction"> internal friction</a>, <a href="https://publications.waset.org/search?q=microhardness" title=" microhardness"> microhardness</a>, <a href="https://publications.waset.org/search?q=relaxation." title=" relaxation. "> relaxation. </a> </p> <a href="https://publications.waset.org/10004868/influence-of-boron-doping-and-thermal-treatment-on-internal-friction-of-monocrystalline-si1-xgexx002-alloys" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/10004868/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a href="https://publications.waset.org/10004868/bibtex" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">BibTeX</a> <a href="https://publications.waset.org/10004868/chicago" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Chicago</a> <a href="https://publications.waset.org/10004868/endnote" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">EndNote</a> <a href="https://publications.waset.org/10004868/harvard" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Harvard</a> <a href="https://publications.waset.org/10004868/json" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">JSON</a> <a href="https://publications.waset.org/10004868/mla" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">MLA</a> <a href="https://publications.waset.org/10004868/ris" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">RIS</a> <a href="https://publications.waset.org/10004868/xml" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">XML</a> <a href="https://publications.waset.org/10004868/iso690" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">ISO 690</a> <a href="https://publications.waset.org/10004868.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">1019</span> </span> </div> </div> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1</span> Physical-Mechanical Characteristics of Monocrystalline Si1-xGex (x≤0,02) Solid Solutions</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=I.%20Kurashvili">I. Kurashvili</a>, <a href="https://publications.waset.org/search?q=A.%20Sichinava"> A. Sichinava</a>, <a href="https://publications.waset.org/search?q=G.%20Bokuchava"> G. Bokuchava</a>, <a href="https://publications.waset.org/search?q=G.%20Darsavelidze"> G. Darsavelidze</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Si-Ge solid solutions (bulk poly- and mono-crystalline samples, thin films) are characterized by high perspectives for application in semiconductor devices, in particular, optoelectronics and microelectronics. From this point of view, complex studying of structural state of the defects and structural-sensitive physical properties of Si-Ge solid solutions depending on the contents of Si and Ge components is very important. Present work deals with the investigations of microstructure, microhardness, internal friction and shear modulus of Si1-xGex(x≤0,02) bulk monocrystals conducted at room temperature. Si-Ge bulk crystals were obtained by Czochralski method in [111] crystallographic direction. Investigated monocrystalline Si-Ge samples are characterized by p-type conductivity and carriers’ concentration 5.1014-1.1015cm-3. Microhardness was studied on Dynamic Ultra Micro hardness Tester DUH-201S with Berkovich indenter. Investigate samples are characterized with 0,5x0,5x(10-15)mm3 sizes, oriented along [111] direction at torsion oscillations ≈1Hz, multistage changing of internal friction and shear modulus has been revealed in an interval of strain amplitude of 10-5-5.10-3. Critical values of strain amplitude have been determined at which hysteretic changes of inelastic characteristics and microplasticity are observed. The critical strain amplitude and elasticity limit values are also determined. Dynamic mechanical characteristics decreasing trend is shown with increasing Ge content in Si-Ge solid solutions. Observed changes are discussed from the point of view of interaction of various dislocations with point defects and their complexes in a real structure of Si-Ge solid solutions. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=Internal%20friction" title="Internal friction">Internal friction</a>, <a href="https://publications.waset.org/search?q=microhardness" title=" microhardness"> microhardness</a>, <a href="https://publications.waset.org/search?q=relaxation%0D%0Aprocesses" title=" relaxation processes"> relaxation processes</a>, <a href="https://publications.waset.org/search?q=shear%20modulus" title=" shear modulus"> shear modulus</a>, <a href="https://publications.waset.org/search?q=Si-Ge." title=" Si-Ge."> Si-Ge.</a> </p> <a href="https://publications.waset.org/10002620/physical-mechanical-characteristics-of-monocrystalline-si1-xgex-x002-solid-solutions" class="btn btn-primary btn-sm">Procedia</a> <a 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Search results for: A. Sichinava