Characteristic free volumes of bulk metallic glasses: Measurement and their correlation with glass-forming ability

被引：29

作者：

Hu, Qiang ^{[3
]}

Zeng, Xie-Rong ^{[1
,2
]}

Fu, M. W. ^{[4
]}

机构：

[1] Shenzhen Univ, Coll Mat Sci & Engn, Shenzhen 518060, Peoples R China

[2] Shenzhen Key Lab Special Funct Mat, Shenzhen 518060, Peoples R China

[3] NW Polytech Univ, Sch Mat Sci & Engn, Xian 710072, Peoples R China

[4] Hong Kong Polytech Univ, Dept Mech Engn, Kowloon, Hong Kong, Peoples R China

来源：

JOURNAL OF APPLIED PHYSICS | 2011年 / 109卷 / 05期

关键词：

STRUCTURAL RELAXATION; TRANSITION; ALLOYS; LIQUID; THERMODYNAMICS; DIAMETER; KINETICS; DENSITY;

D O I：

10.1063/1.3549819

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A convenient method is proposed for the measurement of the characteristic free volumes, viz., the amount of excess free volume annihilation in structural relaxation Vf-sr and the amount of new free volume production in glass transition Vf-gt of bulk metallic glasses (BMGs) by thermal dilation (DIL) test. Through the DIL tests, the characteristic free volumes are found to be sensitive to the change of glass forming ability (GFA). The Pd40Cu30Ni10P20 BMG has a quite small Vf-sr. For a series of Fe-Cr-Mo-C-B-(Er) BMGs, Fe48Cr15Mo14C15B6Er2 with the largest GFA is identified to have the largest Vf-gt and smallest Vf-sr. The correlation between Vf-sr and the squares of critical diameters of these iron-based BMGs can be fitted as a negative exponential function with high accuracy. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3549819]

引用

页数：5

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