TITLE

Effect of atomic configuration and liquid stability on the glass-forming ability of Ca-based metallic glasses

AUTHOR(S)
Park, E. S.; Kim, D. H.
PUB. DATE
May 2005
SOURCE
Applied Physics Letters;5/16/2005, Vol. 86 Issue 20, p201912
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
In the present study, we report a Ca–Mg–Ni alloy exhibiting significantly improved glass-forming ability (GFA). The Ca60Mg25Ni15 bulk metallic glass (BMG) with a diameter of 13 mm is successfully fabricated by a conventional copper mold casting method in air atmosphere. The ΔTx, Trg, K, and γ parameters exhibit very poor correlation with the GFA. However, the σ parameter exhibits a far better correlation with GFA, indicating that the liquid phase stability and atomic size mismatch dominantly affect the GFA of Ca-based ternary BMGs. The GFA of alkaline-earth-metal-based ternary BMGs such as Ca- and Mg-based BMGs cannot be described properly only by considering thermodynamic and/or kinetic criterion (ΔTx, Trg, K, and γ parameters), but can well be described by considering atomic configuration criterion as well as thermodynamic criterion (σ parameter).
ACCESSION #
17164891

 

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