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Effect of local structures and atomic packing on glass forming ability in CuxZr100-x metallic glasses

TitleEffect of local structures and atomic packing on glass forming ability in CuxZr100-x metallic glasses
Publication TypeJournal Article
Year of Publication2010
AuthorsPeng HL, Li MZ, Wang WH, Wang CZ, Ho KM
Journal TitleApplied Physics Letters
Volume96
Pages021901
Date Published01/11
ISBN Number0003-6951
Accession NumberISI:000273689400014
Keywordsamorphous-alloys, copper, density, glass structure, liquid, metallic glasses, molecular dynamics method, vitrification, zirconium alloys
Abstract

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.
URL<Go to ISI>://000273689400014
DOI10.1063/1.3282800