计算物理 ›› 2003, Vol. 20 ›› Issue (2): 137-141.

• 论文 • 上一篇    下一篇

二元合金表面偏析的Monte Carlo方法模拟

邓辉球, 胡望宇, 舒小林   

  1. 湖南大学应用物理系, 湖南 长沙 410082
  • 收稿日期:2001-11-28 修回日期:2002-07-22 出版日期:2003-03-25 发布日期:2003-03-25
  • 作者简介:邓辉球(1973-),男,湖南,副教授,博士,主要从事计算物理方面的研究.
  • 基金资助:
    教育部跨世纪优秀人才培养计划、教育部骨干教师计划资助项目

Surface Segregation of Binary Alloys with Monte Carlo Simulation

DENG Hui-qiu, HU Wang-yu, SHU Xiao-lin   

  1. Department of Applied Physics, Hunan University, Changsha 410082, China
  • Received:2001-11-28 Revised:2002-07-22 Online:2003-03-25 Published:2003-03-25

摘要: 详细介绍了二元合金表面偏析的Monte Carlo模拟方法,并应用改进的分析型嵌入原子模型结合Monte Carlo方法模拟研究了Pd-Au合金表面成分及其剖面成分分布,发现Au在表面偏析,并同已有实验结果进行了比较.

关键词: Monte Carlo模拟, 表面偏析, Pd-Au合金

Abstract: The Monte Carlo method, which can be used to simulate the surface segregation of binary alloys, is discussed. Using our analytic modified EAM potentials, the surface concentrations and concentration depth profiles of Pd-Au binary alloys are studied with Monte Carlo simulation based on the Grand Canonical Ensemble Statistical Rule. Simulation results show that the topmost surface is enriched with Au, and a damped oscillation of Au concentration is found in the whole composition range. The results are in agreement with the available experiment data and other theoretical values.

Key words: Monte Carlo simulation, surface segregation, Pd-Au alloy

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