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Liquid Structures of Metallic Glass-forming Binary Zr Alloys

Published online by Cambridge University Press:  01 February 2011

Akitoshi Mizuno ,
Toshihiko Akimoto ,
Masahito Watanabe ,
Shinji Kohara  and
Masaki Takata
Akitoshi Mizuno
Affiliation:
[email protected], United States
Toshihiko Akimoto
Affiliation:
[email protected], Gakushuin University, physics, Tokyo, Japan
Masahito Watanabe
Affiliation:
[email protected], Gakushuin University, Department of Physics, Tokyo, Japan
Shinji Kohara
Affiliation:
[email protected], JASRI/SPring-8, Hyogo, Japan
Masaki Takata
Affiliation:
[email protected], SPring-8/RIKEN, Hyogo, Japan
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Abstract

We have analyzed liquid structures of the binary Zr-TM (TM=Pd, Cu, Ni) alloys as a function of composition to investigate relations with their glass-forming abilities. High-energy x-ray (E=113 keV) diffraction experiments were performed and a conical nozzle levitation (CNL) technique was applied to achieve a containerless condition for highly reactive melts with high temperature. Structure information of the liquid alloys has been obtained with the aid of reverse Monte Carlo simulation. A shoulder was found at high-Q side of the second peak for the structure factor for Zr70Pd30 as well as the Zr70Cu30 alloy and the Zr50Cu50 alloys, which can be indication of the formation of ISRO in the liquid alloys. Liquid Zr-Ni alloys shows an apparent difference in the structure factors between the Zr70Ni30 and the Zr50Ni50 alloys, which can be associated with the formation of the chemical short range ordering, whereas the Zr-Pd alloys show a typical random distribution of atoms.

Keywords

x-ray diffraction (XRD)liquidamorphous
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1152: Symposium TT – Local Structure and Dynamics in Amorphous Systems , 2008 , 1152-TT03-06
Copyright
Copyright © Materials Research Society 2009

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References

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