计算物理 ›› 1995, Vol. 12 ›› Issue (3): 320-324.

• 论文 • 上一篇    下一篇

用修正嵌入原子法(MEAM)研究金属铝的稳定性

聂西凉1, 王仁卉1, 叶亦英2, 印鉴3   

  1. 1. 武汉大学物理系, 武汉 430072;
    2. 武汉大学分析测试中心, 武汉 430072;
    3. 武汉大学计科系, 武汉 430072
  • 收稿日期:1993-11-02 出版日期:1995-09-25 发布日期:1995-09-25

STABILITY STUDY OF THE METAL A1 BY THE MODIFIED-EMBEDDED-ATOM METHOD

Nie Xi Liang1, Wang Renhui1, Ye Yiying2, Yin Jian3   

  1. 1. Department of Physics, Wuhan University, Wuhan 430072;
    2. Center of instrumental Analysis, Wyhan 430072;
    3. Department of Computer Science, Wuhan University, Wuhan 430072
  • Received:1993-11-02 Online:1995-09-25 Published:1995-09-25

摘要: 用两种不同的嵌入原子法(即EAM和MEAM)计算了Al结合能、层错能,并考察了它的稳定性,发现用修正嵌入原子法计算出的结果与已有的实验和理论结果基本一致。作者认为对立方晶系材料,原子的电子密度可用自由原子外层电荷密度的线性迭加表示,而不用修正嵌入原子法中的解析拟合过程表示.

关键词: 嵌入原子方法(EAM), 修正嵌入原子法(MEAM), 层错能

Abstract: The cohesive energy, stack fault energy and examined it's stability have been calculated by the means of the EAM and the ME AM in the present paper. The calculated results are in good agreement with the existing experimental results and calculated results. According to the works, the authors consider that the atomic electron density is a superposition of outer electron density of all free atoms, instead of the analytical fit in the MEAM.

Key words: EAM, MEAM, Stack fault energy

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