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Formation of Ca–Mg–Zn bulk glassy alloy by casting into cone-shaped copper mold

Published online by Cambridge University Press:  03 March 2011

E.S. Park  and
D.H. Kim
E.S. Park
Affiliation:
Center for Non-crystalline Materials, Department of Metallurgical Engineering, Yonsei University, Seoul 120-749 Korea
D.H. Kim*
Affiliation:
Center for Non-crystalline Materials, Department of Metallurgical Engineering, Yonsei University, Seoul 120-749 Korea
*
a)Address all correspondence to this author.e-mail: dohkim@yonsei.ac.kr
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Abstract

A new Ca–Mg–Zn alloys having significantly improved glass-forming ability (GFA) has been developed. The ternary Ca65Mg15Zn20 bulk metallic glass with diameter of at least 15 mm is successfully fabricated by conventional copper-mold casting method in air atmosphere. The critical cooling rate for glass formation in the cone-shaped copper mold is less than 20 K/s. When compared with the GFA of Ca–Mg–M (M: Cu, Ni, and Ag) alloys, the significantly improved GFA of the Ca–Mg–Zn alloy cannot be represented by ΔTx, Trg, K, and γ parameters.

Keywords

CastingMetallic glassCritical exponent analysis
Type
Rapid Communications
Information
Journal of Materials Research , Volume 19 , Issue 3 , March 2004 , pp. 685 - 688
Copyright
Copyright © Materials Research Society 2004

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References

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