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Some correlations for diffusion in amorphous alloys

Published online by Cambridge University Press:  31 January 2011

S. K. Sharma ,
S. Banerjee ,
Kuldeep  and
Animesh K. Jain
S. K. Sharma
Affiliation:
Physical Metallurgy Division, Bhabha Atomic Research Centre, Bombay–400 085, India
S. Banerjee
Affiliation:
Physical Metallurgy Division, Bhabha Atomic Research Centre, Bombay–400 085, India
Kuldeep
Affiliation:
Nuclear Physics Division, Bhabha Atomic Research Centre, Bombay-400 085, India
Animesh K. Jain
Affiliation:
Nuclear Physics Division, Bhabha Atomic Research Centre, Bombay-400 085, India
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Abstract

Diffusion of several impurity atoms (Cu, Al, Au, and Sb) has been studied in Zr61Ni39 and Fe82B18 amorphous alloys. A definite correlation between the diffusion coefficient (D) and the atomic size of the diffusant is seen for the metal-metal (M–M) alloy, while it is not clear for the metal-metalloid (M–Me) alloy. Based on the present data, as well as other published data in binary amorphous alloys, empirical correlations have been found between (i) the activation energy (Q) and the energy required to form a hole of the size of the diffusing atom in the host alloy, and (ii) the pre-exponential factor (D0) and Q. While the former correlation is seen only for binary M–M type of amorphous alloys, the latter correlation is more general and holds for all types of amorphous alloys. Based on the correlation between D0 and Q, it is proposed that there are two distinct mechanisms of diffusion in amorphous alloys.

Type
Articles
Information
Journal of Materials Research , Volume 4 , Issue 3 , June 1989 , pp. 603 - 606
Copyright
Copyright © Materials Research Society 1989

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