Role of Zr in icosahedral forming in Cu-Zr metallic glasses

被引：3
|
作者：
Shi, Xiaohong [1 ]
Zhang, Jianlong [1 ]
Sun, Minhua [1 ]
机构：
[1] Harbin Normal Univ, Sch Phys & Elect Engn, Minist Educ, Key Lab Photon & Elect Band Gap Mat, Harbin 150025, Peoples R China
来源：
MATERIALS LETTERS | 2015年 / 157卷
关键词：
Microstructure; Amorphous materials; Metallic glasses; Molecular dynamics simulation;
D O I：
10.1016/j.matlet.2015.05.100
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Using molecular dynamics simulations we investigate the role of Zr on the icosahedral forming and slow dynamic in Cu-Zr metallic glasses during the rapid solidification. Our analysis shows that Zr is a strong icosahedral forming element. It can not only improve the formation of Zr-centered icosahedra but also stabilize the Cu-centered icosahedra. The atomic diffusivity of Zr is found to be intrinsically slower than that of Cu atoms. Pinning effect of Zr atoms in slowing down the dynamics is Observed for the first time. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：180 / 182
页数：3
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