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Glass Formation Dependence on Casting Atmosphere in a Zr-Al-Ni-Cu-Pd Alloy System

Published online by Cambridge University Press:  01 February 2011

Albertus Deny Setyawan ,
Hidemi Kato ,
Junji Saida  and
Akihisa Inoue
Albertus Deny Setyawan
Affiliation:
alb_deny@cir.tohoku.ac.jp, Tohoku University, Center for Interdisciplinary Research, Aramaki-aza Aoba 6-3, Aoba-ku, Sendai, 980-8578, Japan, +81-22-795-5760, +81-22-795-7810
Hidemi Kato
Affiliation:
hikato@imr.tohoku.ac.jp, Tohoku University, Institute for Materials Research, Katahira 2-1-1, Aoba-ku, Sendai, 980-8577, Japan
Junji Saida
Affiliation:
jsaida@cir.tohoku.ac.jp, Tohoku University, Center for Interdisciplinary Research, Aramaki-aza Aoba 6-3, Aoba-ku, Sendai, 980-8578, Japan
Akihisa Inoue
Affiliation:
ainoue@imr.tohoku.ac.jp, Tohoku University, Institute for Materials Research, Katahira 2-1-1, Aoba-ku, Sendai, 980-8577, Japan
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Abstract

A Zr65Al7.5Ni10Cu17.5-xPdx (x=0-17.5 at. %) alloy system is found to exhibit a unique dependence of glass-forming ability (GFA) on casting atmosphere during mold-casting process. High-Pd containing alloys (x=7.5-17.5) showed a remarkable increase of critical size (dc) for glass formation, in contrast with the low-Pd containing alloys (x=0-5) in which no significant change in dc was observed, as the pressure of Ar atmosphere varied from vacuum to ambient. The origin of the phenomenon has been successively unveiled by correlating the cooling characteristic during casting process and phase transformation behavior during continuous cooling of the alloy system. The consequence in the structure and property control is investigated and discussed in detail.

Keywords

amorphouscastingphase transformation
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1048: Symposium Z – Bulk Metallic Glasses–2007 , 2007 , 1048-Z08-18
Copyright
Copyright © Materials Research Society 2008

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