Journal
APPLIED PHYSICS LETTERS
Volume 96, Issue 2, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3282800
Keywords
copper; glass structure; metallic glasses; molecular dynamics method; vitrification; zirconium alloys
Categories
Funding
- NSF of China [50731008, 50621061]
- MOST 973 [2007CB613904]
- U.S. Department of Energy, basic Energy Sciences [DE-AC02-07CH11358]
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Molecular dynamics simulations are performed for CuZr metallic alloys to study the structural and dynamical features for glass forming ability (GFA). Our analysis shows that in CuZr metallic system, although << 0,0,12,0 >> icosahedral clusters are important, some Zr-centered clusters such as << 0,1,10,4 >> and << 0,1,10,5 >> play a key role in slowing down the dynamics. It is found that these Zr-centered clusters are intrinsically slow and fundamentally determine the stability and slow dynamics. Due to the strong spatial correlation between << 0,0,12,0 >> and Zr-centered clusters, their relative population influences the dense packing and dynamics in metallic glasses, and further the GFA.
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