Effect of local structures and atomic packing on glass forming ability in Cu{sub x}Zr{sub 100-x} metallic glasses

Journal Article · Mon Jan 11 00:00:00 EST 2010 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3282800· OSTI ID:21347237

Peng, H L ^[1]; Li, M Z ^[1]; Wang, W H ^[2]; Wang, C -Z; Ho, K M ^[3]

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1. Department of Physics, Renmin University of China, Beijing 100872 (China)
2. Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China)
3. Ames Laboratory-USDOE, Iowa State University, Ames, Iowa 50011 (United States)

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.

• OSTI ID: 21347237
• Journal Information: Applied Physics Letters, Vol. 96, Issue 2; Other Information: DOI: 10.1063/1.3282800; (c) 2010 American Institute of Physics; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BINARY ALLOY SYSTEMS
COPPER ALLOYS
METALLIC GLASSES
MOLECULAR DYNAMICS METHOD
SIMULATION
SLOWING-DOWN
STABILITY
VITRIFICATION
ZIRCONIUM ALLOYS
ALLOY SYSTEMS
ALLOYS
CALCULATION METHODS
TRANSITION ELEMENT ALLOYS