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Self-diffusion in Zr55Al10Ni10Cu25 and Pd40Cu30Ni10P20 Bulk Metallic Glass

Published online by Cambridge University Press:  17 March 2011

H. Nakajima ,
T. Kojima ,
K. Nonaka ,
T. Zhang ,
A. Inoue  and
N. Nishiyama
H. Nakajima
Affiliation:
The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan
T. Kojima
Affiliation:
The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan
K. Nonaka
Affiliation:
Department of Materials Science and Technology, Iwate University, Morioka 020-8551, Japan
T. Zhang
Affiliation:
Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
A. Inoue
Affiliation:
Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
N. Nishiyama
Affiliation:
ERATO,Japan Science and Technology Corporation, Sendai982-0807, Japan
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Abstract

Self-diffusion coefficients of Ni in Zr55Al10Ni10Cu25and of Ni and Pd inPd40Cu30Ni10P20 bulk metallic glass below and above the glass transition temperature Tg have been measured with an ion-beam sputter-sectioning technique using the radioactive isotope 63Ni and 103Pd. The diffusion coefficients in the supercooled liquid region are much higher than those extrapolated from low temperature data in the amorphous region. The temperature dependence of the diffusion coefficients exhibits non-Arrhenius behaviour in the supercooled liquid phase. Such a deviation from the Arrhenius plots is interpreted by a cooperation of moving tracer atom with the surrounding atoms. The difference of the diffusion behaviour in between Zr-Al-Ni-Cu and Pd-Cu-Ni-P glasses is attributed to the different structural stability of both glasses.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 644: Symposium L – Supercooled Liquid, Bulk Glassy and Nanocrystalline State of Alloys , 2000 , L2.2
Copyright
Copyright © Materials Research Society 2001

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