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

Qiang Hu; Xie Rong Zeng; Mingwang Fu

doi:10.1063/1.3549819

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

Qiang Hu, Xie Rong Zeng, Mingwang Fu

Research output: Journal article publication › Journal article › Academic research › peer-review

30 Citations (Scopus)

Abstract

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-srand the amount of new free volume production in glass transition Vf-gtof 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 Pd40Cu30Ni10P20BMG has a quite small Vf-sr. For a series of Fe-Cr-Mo-C-B-(Er) BMGs, Fe48Cr15Mo14C15B6Er2with the largest GFA is identified to have the largest Vf-gtand smallest Vf-sr. The correlation between Vf-srand the squares of critical diameters of these iron-based BMGs can be fitted as a negative exponential function with high accuracy.

Original language	English
Article number	053520
Journal	Journal of Applied Physics
Volume	109
Issue number	5
DOIs	https://doi.org/10.1063/1.3549819
Publication status	Published - 1 Mar 2011

ASJC Scopus subject areas

General Physics and Astronomy

More information

10.1063/1.3549819

http://hdl.handle.net/10397/4891

Cite this

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

Abstract

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