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Oxygen Distribution in Zr-Based Metallic Glasses

Published online by Cambridge University Press:  10 February 2011

D. H. Ping ,
K. Hono  and
A. Inoue
D. H. Ping
Affiliation:
National Research Institute for Metals, Sengen 1–2-1, Tsukuba 305–0047, Japan
K. Hono
Affiliation:
National Research Institute for Metals, Sengen 1–2-1, Tsukuba 305–0047, Japan
A. Inoue
Affiliation:
Institute of Materials Research, Tohoku University, Sendai 980–8577, Japan
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Abstract

This paper reports the atom probe analysis results of the oxygen dissolved in the as-cast amorphous and crystallized Zr65Cu15Al10Pd10 and Zr65Cul17.5Ni10Al17.5 alloys. Impurity oxygen ranging from 0.1 to 1 at.% is dissolved uniformly in the as-quenched Zr65Cu15A110Pd10 and Zr65Cu17.5Ni10Al7.5 amorphous alloys even though the oxygen is not added intentionally. When the Zr65Cu15Al10Pd10 alloy is crystallized, oxygen redistribution occurs; it is rejected from the primary Zr2 (Cu, Pd) crystals and partitioned in the subsequently crystallized phases. Oxygen atoms are enriched in some of the crystalline phases up to approximately 4 at.%, and virtually no oxygen is dissolved in the remaining amorphous phase. In the partially crystallized Zr65Cu17.5Ni10Al7.5 alloy, fine oxygen enriched particles containing ∼ 15 at.%O have been detected in direct contacted with crystalline grains. This work demonstrates that oxygen redistribution occurs during the crystallization reaction, thereby influencing the kinetics of crystallization.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 554: Symposium MM – Bulk Metallic Glasses , 1998 , 3
Copyright
Copyright © Materials Research Society 1999

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