摘要翻译:
我们研究了晶界在晶体材料中的扩散。我们特别考虑了一个规则间隔的低角度晶界的情况,它被图式化为一系列位错,这些位错通过长程应力场与晶体的Peierls-Nabarro势相互作用。分析晶界质心动力学及其时空涨落的方法是基于过阻尼朗之万方程。与分子动力学模拟结果的一致性证明了该方法的通用性和有效性。
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英文标题:
《Grain Boundary Diffusion in a Peierls-Nabarro Potential》
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作者:
F. Leoni and S. Zapperi
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最新提交年份:
2007
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分类信息:
一级分类:Physics        物理学
二级分类:Statistical Mechanics        统计力学
分类描述:Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变,热力学,场论,非平衡现象,重整化群和标度,可积模型,湍流
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一级分类:Physics        物理学
二级分类:Materials Science        材料科学
分类描述:Techniques, synthesis, characterization, structure.  Structural phase transitions, mechanical properties, phonons. Defects, adsorbates, interfaces
技术,合成,表征,结构。结构相变,力学性质,声子。缺陷,吸附质,界面
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英文摘要:
  We investigate the diffusion of a grain boundary in a crystalline material. We consider in particular the case of a regularly spaced low-angle grain boundary schematized as an array of dislocations that interact with each other through long-range stress fields and with the crystalline Peierls-Nabarro potential. The methodology employed to analyze the dynamics of the center of mass of the grain boundary and its spatio-temporal fluctuations is based on over-damped Langevin equations. The generality and the efficiency of this technique is proved by the agreement with molecular dynamics simulations. 
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PDF链接:
https://arxiv.org/pdf/710.0807