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

E. S. Park; D. H. Kim

doi:10.1063/1.1931832

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

E. S. Park, D. H. Kim

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

33 Citations (Scopus)

Abstract

In the present study, we report a Ca-Mg-Ni alloy exhibiting significantly improved glass-forming ability (GFA). The Ca60 Mg25 Ni15 bulk metallic glass (BMG) with a diameter of 13 mm is successfully fabricated by a conventional copper mold casting method in air atmosphere. The Δ Tx, Trg, K, and γ parameters exhibit very poor correlation with the GFA. However, the γ 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 (Δ Tx, Trg, K, and γ parameters), but can well be described by considering atomic configuration criterion as well as thermodynamic criterion (γ parameter).

Original language	English
Article number	201912
Pages (from-to)	1-3
Number of pages	3
Journal	Applied Physics Letters
Volume	86
Issue number	20
DOIs	https://doi.org/10.1063/1.1931832
Publication status	Published - 2005 May 16

Bibliographical note

Funding Information:
This work was supported by the Creative Research Initiatives of the Korean Ministry of Science and Technology.

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.1931832

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abstract = "In the present study, we report a Ca-Mg-Ni alloy exhibiting significantly improved glass-forming ability (GFA). The Ca60 Mg25 Ni15 bulk metallic glass (BMG) with a diameter of 13 mm is successfully fabricated by a conventional copper mold casting method in air atmosphere. The Δ Tx, Trg, K, and γ parameters exhibit very poor correlation with the GFA. However, the γ 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 (Δ Tx, Trg, K, and γ parameters), but can well be described by considering atomic configuration criterion as well as thermodynamic criterion (γ parameter).",

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AU - Kim, D. H.

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PY - 2005/5/16

Y1 - 2005/5/16

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

Abstract

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