M. Matsuura, T. Fujita, K. Konno, W. Zhang, and M.W. Chen,  Scripta Mater., 66 (2012), 927-930.

Abstract

In situ measurements of the X-ray absorption fine structure for the supercooled liquid state of Au65Cu10.5Si17Ag7.5 bulk metallic glass, which exhibits extraordinarily low Tg and a stable supercooled liquid state, were performed. Analyses of data combined with molecular dynamics simulation suggest that the glass transition is caused by the breakdown of Cu–Cu bonding which connects Cu-centered icosahedral clusters. Cu atoms play a key role in the enhancement of glass formability and the low Tg of the Au65Cu10.5Si17Ag7.5 bulk metallic glass.

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