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Surface effect on the screw dislocation mobility over the Peierls barrier

机译:表面作用对Peierls势垒上螺钉脱位迁移率的影响

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The effect of the image force on the Peierls stress (τ p ) of a screw dislocation below a free surface is studied via a self-consistent semidiscrete variational Peierls-Nabarro model. The consequence of reduction in elastic energy and increase in stacking fault energy by the presence of the free surface is found to additively increase the Peierls stress (τ p ). This model gives a physical interpretation of the same tend observed in a recent molecular dynamic study, while previous continuum analysis predicted the opposite.View full textDownload full textKeywordsPeierls stress, Peierls-Nabarro model, dislocations, surfaces, thin filmsRelated var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/09500839.2012.669053
机译:通过自洽半离散变分Peierls-Nabarro模型研究了像力对自由表面以下螺钉位错的Peierls应力(Ï„ p )的影响。发现自由表面的存在会降低弹性能并增加堆垛层错能,其结果会增加Peierls应力(Ï„ p )。该模型给出了对近期分子动力学研究中观察到的相同趋势的物理解释,而先前的连续谱分析预测了相反的趋势。查看全文下载全文关键词Peierls应力,Peierls-Nabarro模型,位错,表面,薄膜相关的var addthis_config = {ui_cobrand: “泰勒和弗朗西斯在线”,services_compact:“ citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,更多”,发布:“ ra-4dff56cd6bb1830b”};添加到候选列表链接永久链接http://dx.doi.org/10.1080/09500839.2012.669053

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