中国物理B ›› 2014, Vol. 23 ›› Issue (6): 66802-066802.doi: 10.1088/1674-1056/23/6/066802

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Atomic diffusion across Ni50Ti50–Cu explosive welding interface：Diffusion layer thickness and atomic concentration distribution

陈仕洋a, 武振伟a, 刘凯欣a b   

  1. a LTCS and Department of Mechanics and Engineering Science, College of Engineering, Peking University, Beijing 100871, China;
    b Center for Applied Physics and Technology, Peking University, Beijing 100871, China
  • 收稿日期:2013-10-07 修回日期:2013-12-11 出版日期:2014-06-15 发布日期:2014-06-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 10732010, 10972010, 11332002, and 11028206).

Atomic diffusion across Ni50Ti50–Cu explosive welding interface：Diffusion layer thickness and atomic concentration distribution

Chen Shi-Yang (陈仕洋)a, Wu Zhen-Wei (武振伟)a, Liu Kai-Xin (刘凯欣)a b   

  1. a LTCS and Department of Mechanics and Engineering Science, College of Engineering, Peking University, Beijing 100871, China;
    b Center for Applied Physics and Technology, Peking University, Beijing 100871, China
  • Received:2013-10-07 Revised:2013-12-11 Online:2014-06-15 Published:2014-06-15
  • Contact: Liu Kai-Xin E-mail:kliu@pku.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 10732010, 10972010, 11332002, and 11028206).

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摘要： Molecular dynamics simulations are carried out to study atomic diffusion in the explosive welding process of Ni50Ti50-Cu (at.%). By using a hybrid method which combines molecular dynamics simulation and classical diffusion theory, the thickness of the diffusion layer and the atomic concentration distribution across the welding interface are obtained. The results indicate that the concentration distribution curves at different times have a geometric similarity. According to the geometric similarity, the atomic concentration distribution at any time in explosive welding can be calculated. Ni50Ti50-Cu explosive welding and scanning electron microscope experiments are done to verify the results. The simulation results and the experimental results are in good agreement.

关键词: diffusion, interfaces, explosive welding, molecular dynamics

Abstract: Molecular dynamics simulations are carried out to study atomic diffusion in the explosive welding process of Ni50Ti50-Cu (at.%). By using a hybrid method which combines molecular dynamics simulation and classical diffusion theory, the thickness of the diffusion layer and the atomic concentration distribution across the welding interface are obtained. The results indicate that the concentration distribution curves at different times have a geometric similarity. According to the geometric similarity, the atomic concentration distribution at any time in explosive welding can be calculated. Ni50Ti50-Cu explosive welding and scanning electron microscope experiments are done to verify the results. The simulation results and the experimental results are in good agreement.

Key words: diffusion, interfaces, explosive welding, molecular dynamics

中图分类号:  (Diffusion; interface formation)

  • 68.35.Fx
02.70.Ns (Molecular dynamics and particle methods)