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http://dx.doi.org/10.7777/jkfs.2011.31.4.186

A New Cu-Hf-Al-Be Bulk Amorphous Alloy with High Glass Forming Ability  

Shin, Sang-Soo (Green Technology Center, Korea Institute of Industrial Technology)
Lim, Kyoung-Mook (Green Technology Center, Korea Institute of Industrial Technology)
Kim, Seong-Nyeong (Dept. Metallurgy and Ceramics Science, Tokyo Institute of Technology)
Kim, Eok-Soo (Green Technology Center, Korea Institute of Industrial Technology)
Publication Information
Journal of Korea Foundry Society / v.31, no.4, 2011 , pp. 186-190 More about this Journal
Abstract
A new Cu-Hf-Al-Be monolithic bulk amorphous alloy was developed utilizing minimal use of toxic and expensive Be. The developed alloy exhibits a large glass forming ability (GFA) (${\Phi}8$ mm). The possible mechanisms underlying the enhancement of the glass forming ability by this alloy are discussed based on the dimensionless parameter ${\gamma}$. In addition, alloy design strategy for the improvement of GFA is proposed in the viewpoint of heat of mixing (${\Delta}H_{mix}$)difference and atomic packing state.
Keywords
Bulk amorphous alloy; Glass forming ability; Plasticity; ${\gamma}$ parameter; Atomic packing density;
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