Cluster formulae for metallic glasses derived from devitrification phases

被引：8

作者：

Chen, Jixiang ^{[1
,2
]}

Wang, Qing ^{[1
]}

Wang, Yingmin ^{[1
]}

Qiang, Jianbing ^{[1
]}

Li, Fengwei ^{[1
]}

Zhu, Chunlei ^{[1
]}

Dong, Chuang ^{[1
]}

机构：

[1] Dalian Univ Technol, Minist Educ, Key Lab Mat Modificat Laser Ion & Electron Beams, Dalian 116024, Peoples R China

[2] Dalian Maritime Univ, Dept Phys, Dalian 116026, Peoples R China

来源：

PHILOSOPHICAL MAGAZINE | 2012年 / 92卷 / 34期

基金：

美国国家科学基金会;

关键词：

clusters; cluster formula; alloy phases; structure; amorphous alloys; FORMING ABILITY; ALLOYS; MODEL;

D O I：

10.1080/14786435.2012.705041

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Bulk metallic glasses are known to have a composition formula [cluster](glue atom)(1,3) within the framework of the cluster-plus-glue-atom model. The key issue in applying the cluster formula is the determination of the right clusters and glue atoms. As examples, alloy phases in the glass-forming systems Al-Ni-Zr and B-Co-Si are analysed from the viewpoint of nearest coordination polyhedral clusters. These alloy phases are described by [effective cluster](glue atom) x, where the effective cluster refers to true cluster composition after taking account of cluster-sharing in the phase structure. For each alloy phase, a principal cluster can be identified that features the local short-range order of that phase. It is pointed out that the principal clusters can express compositions with high glass-forming abilities, as verified by our experiments in Al-Ni-Zr and B-Co-Si-Ta.

引用

页码：4300 / 4319

页数：20

共 18 条

[1]

[Anonymous], 1997, PEARSONS HDB CRYSTAL

[2]

Bragg WL, 1930, Z KRISTALLOGR, V74, P237

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