Indicators of internal structural states for metallic glasses: Local order, free volume, and configurational potential energy

Y. Q. Cheng; E. Ma

doi:10.1063/1.2966154

Indicators of internal structural states for metallic glasses: Local order, free volume, and configurational potential energy

Y. Q. Cheng, E. Ma

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Abstract

The structural states of metallic glasses (MGs) have been described previously using concepts such as free volume and configurational potential energy. Here we discuss the inadequacy of these indicators by examining a Cu-Zr-Al MG model experiencing different cooling and relaxation history. The results identify the local (icosahedral) ordering as a fundamental process underlying structural relaxation, and the degree of order as a more sensitive and revealing structural indicator.

Original language	English
Article number	051910
Journal	Applied Physics Letters
Volume	93
Issue number	5
DOIs	https://doi.org/10.1063/1.2966154
State	Published - 2008
Externally published	Yes

Funding

The authors thank Professor H.W. Sheng for providing the EAM potentials. This work was supported by US-DoE-BES, DMSE under Contract No. DE-FG02-03ER46056.

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abstract = "The structural states of metallic glasses (MGs) have been described previously using concepts such as free volume and configurational potential energy. Here we discuss the inadequacy of these indicators by examining a Cu-Zr-Al MG model experiencing different cooling and relaxation history. The results identify the local (icosahedral) ordering as a fundamental process underlying structural relaxation, and the degree of order as a more sensitive and revealing structural indicator.",

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AB - The structural states of metallic glasses (MGs) have been described previously using concepts such as free volume and configurational potential energy. Here we discuss the inadequacy of these indicators by examining a Cu-Zr-Al MG model experiencing different cooling and relaxation history. The results identify the local (icosahedral) ordering as a fundamental process underlying structural relaxation, and the degree of order as a more sensitive and revealing structural indicator.

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Indicators of internal structural states for metallic glasses: Local order, free volume, and configurational potential energy

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