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Self and Impurity Diffusion in Icosahedral Al-Pd-Mn Quasicrystals

Published online by Cambridge University Press:  10 February 2011

W. Sprengel ,
H. Nakajima  and
T.A. Lograsso
W. Sprengel
Affiliation:
The Institute of Scientific and Industrial Research, Osaka University, Osaka 567-0047, Japan
H. Nakajima
Affiliation:
The Institute of Scientific and Industrial Research, Osaka University, Osaka 567-0047, Japan
T.A. Lograsso
Affiliation:
Ames Laboratory, Iowa State University, Ames, IA 5001 1, U.S.A.
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Abstract

Diffusivities of Cr in icosahedral quasicrystals of Al-Pd-Mn system have been measured by the radioactive tracer method in combination with a precision grinding technique. The temperature dependence of the diffusivities follows the Arrhenius equation in the investigated temperature range from 850 to 1107 K. The activation energy Q = 235.5 ± 7.8 kJmol-1 and pre-exponential factor D0 = 1.2 × 10-2 m2s-1 were evaluated. The diffusion behavior is discussed in terms of a vacancy diffusion mechanism.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 527: Symposium Z – Diffusion Mechanisms in Crystalline Materials , 1998 , 309
Copyright
Copyright © Materials Research Society 1998

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