Intrinsic correlation between fragility and bulk modulus in metallic glasses

被引：81

作者：

Jiang, Minqiang

Dai, Lanhong ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100080, Peoples R China

[2] State Key Lab Explos Sci & Technol, Beijing 100081, Peoples R China

来源：

PHYSICAL REVIEW B | 2007年 / 76卷 / 05期

关键词：

D O I：

10.1103/PhysRevB.76.054204

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A systematic study on the available data of 26 metallic glasses shows that there is an intrinsic correlation between fragility of a liquid and bulk modulus of its glass. The underlying physics can be rationalized within the formalism of potential energy landscape thermodynamics. It is surprising to find that the linear correlation between the fragility and the bulk-shear modulus ratio exists strictly at either absolute zero temperature or very high frequency. Further analyses indicate that a real flow event in bulk metallic glasses is shear dominant, and fragility is in inverse proportion to shear-induced bulk dilatation. Finally, extension of these findings to nonmetallic glasses is discussed.

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页数：7

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