Oxygen impurity and microalloying effect in a Zr-based bulk metallic glass alloy

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)1105-1112
Journal / PublicationIntermetallics
Volume10
Issue number11-12
Publication statusPublished - Nov 2002
Externally publishedYes

Abstract

A Zr-base bulk metallic glass (BMG) alloy with the base composition Zr-10 at.%Al-5% Ti-17.9% Cu-14.6% Ni (BAM-11) was used to study the effects of oxygen impurities and microalloying on the microstructure and mechanical properties. Oxygen impurity at a level of 3000 appm dramatically reduced the glass forming ability and embrittled BAM-11 at room temperature. The embrittlement was due to the formation of oxygen-induced Zr4Ni2O nuclei that triggered near complete crystallization of the metallic glass. Microalloying with 0.1 at.%B+0.2%Si+0.1%Pb was effective in suppressing the crystalline phase formation and alleviating the detrimental effect of oxygen. Microstructural analyses indicate that the beneficial effect of the optimum dopants was mainly due to stabilization of the glass-phase matrix even though it contained high levels of oxygen. Thus, microalloying is effective in reducing the production cost and is very useful for manufacturing good-quality Zr-based BMGs from impure charge materials. © 2002 Elsevier Science Ltd.

Research Area(s)

  • B. Glasses, metallic, D. Phase interface, Electron microscopy, scanning, F. Atom microprobe, Mechanical properties at ambient temperatures

Citation Format(s)

Oxygen impurity and microalloying effect in a Zr-based bulk metallic glass alloy. / Liu, C. T.; Chisholm, M. F.; Miller, M. K.

In: Intermetallics, Vol. 10, No. 11-12, 11.2002, p. 1105-1112.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review