Atomic Level Structure in Multicomponent Bulk Metallic Glass

被引：799

作者：

Cheng, Y. Q. ^{[1
]}

Ma, E. ^{[1
]}

Sheng, H. W. ^{[2
]}

机构：

[1] Johns Hopkins Univ, Dept Mat Sci & Engn, Baltimore, MD 21218 USA

[2] George Mason Univ, Dept Computat & Data Sci, Fairfax, VA 22030 USA

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 24期

基金：

美国国家科学基金会;

关键词：

AUGMENTED-WAVE METHOD; SHORT-RANGE ORDER; AB-INITIO DATA; POTENTIALS; ZR70CU30; PACKING; ALLOYS; MODEL;

D O I：

10.1103/PhysRevLett.102.245501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The atomic-level structure of a representative ternary Cu-Zr-Al bulk metallic glass (BMG) has been resolved. Cu- (and Al-) centered icosahedral clusters are identified as the basic local structural motifs. Compared with the Cu-Zr base binary, a small percentage of Al in the ternary BMG leads to dramatically increased population of full icosahedra and their spatial connectivity. The stabilizing effect of Al is not merely topological, but also has its origin in the electronic interactions and bond shortening.

引用

页数：4

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