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Influence of oxygen impurity on containerless solidification of quasicrystalline-forming Zr80Pt20 alloy

Published online by Cambridge University Press:  21 March 2013

Takeshi Harada ,
Akitoshi Mizuno  and
Masahito Watanabe
Takeshi Harada
Affiliation:
Gakushuin university, 1-5-1 Mejiro, Toshima, Tokyo, Japan
Akitoshi Mizuno
Affiliation:
Gakushuin university, 1-5-1 Mejiro, Toshima, Tokyo, Japan
Masahito Watanabe
Affiliation:
Gakushuin university, 1-5-1 Mejiro, Toshima, Tokyo, Japan
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Abstract

The influence of oxygen content on containerless solidification of Zr80Pt20 alloy has been studied by using conical nozzle levitation (CNL) technique. The doping level of oxygen from 41 to 5450 ppm mass oxygen (PMO) affects the undercooling of the liquid Zr80Pt20 alloy. Time-resolved synchrotron x-ray diffraction revealed that the quasicrystalline (QC) phase precipitated as a primary phase during solidification of the Zr80Pt20 alloy. The amount of the QC phase depends on the oxygen content in the alloy. This indicates that the doping level of oxygen in Zr80Pt20 alloy can be related to the metastable phase formation as well as the glass-formation ability.

Keywords

x-ray diffraction (XRD)quasicrystalscanning electron microscopy (SEM)
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1528: Symposium VV – Advanced Materials Exploration with Neutrons and Synchrotron X-Rays , 2013 , mrsf12-1528-vv10-10
Copyright
Copyright © Materials Research Society 2013

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