Atomic diffusion across Ni_(50)Ti_(50)Cu explosive welding interface:Diffusion layer thickness and atomic concentration distribution  

作　　者：陈仕洋 武振伟 刘凯欣 

机构地区：[1]LTCS and Department of Mechanics and Engineering Science, College of Engineering, Peking University [2]Center for Applied Physics and Technology, Peking University

出　　处：《Chinese Physics B》2014年第6期446-451,共6页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.10732010,10972010,11332002,and 11028206)

摘　　要：Molecular dynamics simulations are carried out to study atomic diffusion in the explosive welding process of NisoTis0-Cu （at.%）. By using a hybrid method which combines molecular dynamics simulation and classical diffusion the- ory, 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. NisoTis0- 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.Molecular dynamics simulations are carried out to study atomic diffusion in the explosive welding process of NisoTis0-Cu （at.%）. By using a hybrid method which combines molecular dynamics simulation and classical diffusion the- ory, 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. NisoTis0- 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 

分 类 号：O562[理学—原子与分子物理]