Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.13/26197

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Title
Behaviour of the diffusion vacancy-wind factors in the concentrated random alloy
Author/Creator
Belova, I. V.;  Murch, G. E.
Description
In this paper, the vacancy-wind factors which appear in the well known expressions relating the interdiffusion coefficient and intrinsic diffusion coefficients to the tracer diffusion coefficients are examined in the context of the random alloy model. It is shown by Monte Carlo simulation that the formalism of Moleko et al. provides a much better description of these factors than the well known and commonly used formalism of Manning. Even when the ratio of the tracer diffusion coefficients is relatively close to unity, it is preferable to use the Moleko et al. formalism. The latter formalism is re-expressed in this paper to be suitable for direct experimental use in determining vacancy-wind factors. The limiting behaviour of the ratios of the tracer diffusivities and intrinsic diffusivities is also discussed. In the latter case the ratio is given simply (and generally) by the ratio of the exchange frequencies.
Relation
Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties Vol. 81, Issue 7, p. 1749-1758
Publisher Link
http://dx.doi.org/10.1080/01418610108216635
Date
2001
Publisher
Taylor & Franics Ltd
Keyword(s)
vacancy-wind factors;  interdiffusion coefficient;  intrinsic diffusion coefficient;  random alloy;  tracer diffusion coefficient
Resource Type
journal article
Identifier
http://hdl.handle.net/1959.13/26197
Identifier
ISSN:1460-6992
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Subject
"Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties"
 
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