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The surface orientation dependence of the pre-exponential factors extracted from the segregation profiles of a Cu(111/110) bi-crystal

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dc.contributor.author Jafta, CJ
dc.contributor.author Roos, WD
dc.contributor.author Terblans, JJ
dc.contributor.author Asante, JKO
dc.contributor.author Ozoemena, KI
dc.date.accessioned 2012-03-27T10:49:38Z
dc.date.available 2012-03-27T10:49:38Z
dc.date.issued 2011-07
dc.identifier.citation Jafta, CJ, Roos, WD, Terblans, JJ, Asante, JKO and Ozoemena, KI. The surface orientation dependence of the pre-exponential factors extracted from the segregation profiles of a Cu(111/110) bi-crystal. Proceedings of SAIP2011, the 56th Annual Conference of the South African Institute of Physics, St George Hotel, Pretoria, 12-15 July 2011 en_US
dc.identifier.isbn 978-1-86888-688-3
dc.identifier.uri http://www.saip.org.za/images/stories/documents/SAIP_Proceedings/SAIP2011_Proceedings.djvu
dc.identifier.uri http://hdl.handle.net/10204/5683
dc.description Proceedings of SAIP2011, the 56th Annual Conference of the South African Institute of Physics, St George Hotel, Pretoria, 12-15 July 2011 en_US
dc.description.abstract Previous experimental investigations have only shown, without explanation, that the pre-exponential factor (D0), in the diffusion coefficient of Sb segregating in Cu, is dependent on the surface orientation of a crystal. In this study, the surface concentration of Sb in a Sb doped Cu(111/110) bi-crystal was measured using a method combining Auger Electron Spectroscopy (AES) and linear temperature heating. Segregation parameters, including the D0’s are extracted from the experimental data of surface concentration versus temperature using the modified Darken model. The difference in the two pre-exponential factors D0 (Sb in Cu(111)) and D0 (Sb in Cu(110)) is explained thermodynamically in terms of entropy change S that is calculated, for the first time, for a Cu(111/110) bi-crystal. en_US
dc.language.iso en en_US
dc.publisher UNISA en_US
dc.relation.ispartofseries Workflow;8594
dc.subject Bi-crystal en_US
dc.subject Formation entropy en_US
dc.title The surface orientation dependence of the pre-exponential factors extracted from the segregation profiles of a Cu(111/110) bi-crystal en_US
dc.type Conference Presentation en_US
dc.identifier.apacitation Jafta, C., Roos, W., Terblans, J., Asante, J., & Ozoemena, K. (2011). The surface orientation dependence of the pre-exponential factors extracted from the segregation profiles of a Cu(111/110) bi-crystal. UNISA. http://hdl.handle.net/10204/5683 en_ZA
dc.identifier.chicagocitation Jafta, CJ, WD Roos, JJ Terblans, JKO Asante, and KI Ozoemena. "The surface orientation dependence of the pre-exponential factors extracted from the segregation profiles of a Cu(111/110) bi-crystal." (2011): http://hdl.handle.net/10204/5683 en_ZA
dc.identifier.vancouvercitation Jafta C, Roos W, Terblans J, Asante J, Ozoemena K, The surface orientation dependence of the pre-exponential factors extracted from the segregation profiles of a Cu(111/110) bi-crystal; UNISA; 2011. http://hdl.handle.net/10204/5683 . en_ZA
dc.identifier.ris TY - Conference Presentation AU - Jafta, CJ AU - Roos, WD AU - Terblans, JJ AU - Asante, JKO AU - Ozoemena, KI AB - Previous experimental investigations have only shown, without explanation, that the pre-exponential factor (D0), in the diffusion coefficient of Sb segregating in Cu, is dependent on the surface orientation of a crystal. In this study, the surface concentration of Sb in a Sb doped Cu(111/110) bi-crystal was measured using a method combining Auger Electron Spectroscopy (AES) and linear temperature heating. Segregation parameters, including the D0’s are extracted from the experimental data of surface concentration versus temperature using the modified Darken model. The difference in the two pre-exponential factors D0 (Sb in Cu(111)) and D0 (Sb in Cu(110)) is explained thermodynamically in terms of entropy change S that is calculated, for the first time, for a Cu(111/110) bi-crystal. DA - 2011-07 DB - ResearchSpace DP - CSIR KW - Bi-crystal KW - Formation entropy LK - https://researchspace.csir.co.za PY - 2011 SM - 978-1-86888-688-3 T1 - The surface orientation dependence of the pre-exponential factors extracted from the segregation profiles of a Cu(111/110) bi-crystal TI - The surface orientation dependence of the pre-exponential factors extracted from the segregation profiles of a Cu(111/110) bi-crystal UR - http://hdl.handle.net/10204/5683 ER - en_ZA


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