Cluster-plus-glue-atom formulas of Fe-B-based metallic glasses

被引：3

作者：

Naz, Gul Jabeen ^{[1
]}

Dong, Chuang ^{[1
]}

机构：

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

来源：

INTERMETALLICS | 2018年 / 99卷

关键词：

Metallic glass; Cluster-plus-glue-atom model; Cluster formula; Eutectic point; Metastable phase; SOFT-MAGNETIC PROPERTIES; HIGH SATURATION MAGNETIZATION; FORMING ABILITY; BINARY EUTECTICS; PHASE-DIAGRAMS; 4000; MPA; ALLOYS; NB; BEHAVIOR; ZR;

D O I：

10.1016/j.intermet.2018.05.010

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Fe-B-based metallic glasses are formed in a wide concentration range 12-28 at. % B. Previously, the composition formula [B-B2Fe8]Fe in relevance to BFe2 devitrification phase was obtained with the help of cluster-plus-glue-atom model but this formula only explains the B-rich part of the metallic glasses, similar to 25 at.%B. In the present work, the composition formula of B-lean metallic glasses is addressed, considering the involvement of B-lean metastable devitrification phase BFe3 that appears often in Fe-B-based metallic glasses. The Fe-B binary eutectic point Fe83B17 is explained using a dual-cluster formula [Fe-Fe-12]B-3 + [B-Fe-9]B1Fe2 = Fe24B5 approximate to Fe82.8B17.2, where the two formulas are derived respectively from FCC Fe eutectic phase and metastable BFe3 phase. The latter formula, containing similar to 15.4 at.%B, well explains the B-lean metallic glass compositions. The present formula [B-Fe-9]B1Fe2 and the previous one [B-B2Fe8]Fe actually set the lower (i.e., similar to 15.4 at. % B) and upper limit of Fe-B-based metallic glasses (i.e. similar to 25 at. % B).

引用

页码：35 / 38

页数：4

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