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Effect of Ag addition on local structure of Cu–Zr glassy alloy

Published online by Cambridge University Press:  31 January 2011

Dmitri V. Louzguine-Luzgin ,
Kostas Georgarakis ,
Alain R. Yavari ,
Gavin Vaughan ,
Guoqiang Xie  and
Akihisa Inoue
Dmitri V. Louzguine-Luzgin*
Affiliation:
WPI Advanced Institute for Materials Research, and Institute for Materials Research, Tohoku University, Aoba-Ku, Sendai 980-8577, Japan
Kostas Georgarakis
Affiliation:
WPI Advanced Institute for Materials Research, Tohoku University, Aoba-Ku, Sendai 980-8577, Japan; and Science et Ingenieurie des Materiaux et Procedes (SIMAP), Institut National Polytechnique de Grenoble, St-Martin-d'Hères Campus, Grenoble, BP 75, 38402, France
Alain R. Yavari
Affiliation:
Science et Ingenieurie des Materiaux et Procedes (SIMAP), Institut National Polytechnique de Grenoble, St-Martin-d'Hères Campus, 38402 Grenoble, France; and WPI Advanced Institute for Materials Research, Tohoku University, Aoba-Ku, Sendai 980-8577, Japan
Gavin Vaughan
Affiliation:
European Synchrotron Radiation Facility, 38042 Grenoble, France
Guoqiang Xie
Affiliation:
Institute for Materials Research, Tohoku University, Aoba-Ku, Sendai 980-8577, Japan
Akihisa Inoue
Affiliation:
Institute for Materials Research, Tohoku University, Aoba-Ku, Sendai 980-8577, Japan
*
a) Address all correspondence to this author. e-mail: dml@wpi-aimr.tohoku.ac.jp
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Abstract

The effect of Ag substituting Cu on the structural features of the Cu55Zr45, Cu45Zr45Ag10, and Cu35Zr45Ag20 glassy alloys was studied using the real-space pair distribution and radial distribution functions. The experimental x-ray diffraction data obtained in a synchrotron beam were used to derive pair and radial distribution functions through Fourier transformation processing. These results suggest that a certain degree of medium-range order in this alloy is maintained up to about 2.5 nm distance. It is suggested that the addition of Ag causes formation of a more homogeneous local atomic structure compared with that of a binary Cu–Zr alloy, which could be considered as a reason for the improved glass-forming ability of this alloy.

Keywords

AlloyAmorphousX-ray diffraction (XRD)
Type
Articles
Information
Journal of Materials Research , Volume 24 , Issue 1 , January 2009 , pp. 274 - 278
Copyright
Copyright © Materials Research Society 2009

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