Nanoscale Structure and Structural Relaxation in Zr50Cu45Al5 Bulk Metallic Glass

作者:Hwang Jinwoo*; Melgarejo Z H; Kalay Y E; Kalay I; Kramer M J; Stone D S; Voyles P M
来源:Physical Review Letters, 2012, 108(19): 195505.
DOI:10.1103/PhysRevLett.108.195505

摘要

Hybrid reverse Monte Carlo simulations of the structure of Zr50Cu45Al5 bulk metallic glass incorporating medium-range structure from fluctuation electron microscopy data and short-range structure from an embedded atom potential produce structures with significant fractions of icosahedral- and crystal-like atomic clusters. Similar clusters group together into nanometer-scale regions, and relaxation transforms crystal-like clusters into icosahedral clusters. A model refined against only the potential does not agree with the fluctuation microscopy data and contains few crystal-like clusters.

  • 出版日期2012-5-11