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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.13/33716

Title
Vacancy-wind factors and collective correlation factors in nonstoichiometric B2 intermetallic compounds
Author/Creator
Gosain, K. L.;  Chaturvedi, D. K.;  Belova, Irina V.;  Murch, Graeme E.
Institution
The University of Newcastle. Faculty of Science & Information Technology, School of Mathematical and Physical Sciences
Description
The six-jump-cycle (6JC) diffusion mechanism is used to analyze the behavior of vacancy-wind factors and collective correlation factors in partially ordered B2 intermetallic compounds at stoichiometric and near- stoichiometric compositions. Expressions for the vacancywind factors are obtained in the framework of the four-frequency model where the two sublattices exist a priori. The phenomenological coefficients on the two sublattices that remain hitherto independent in 6JC mechanism are connected through a microscopic detailed balance condition. The present results for collective correlation factors when compared with our earlier calculation based on taking the harmonic mean of the sublattice correlation factors show much better agreement with Monte Carlo simulation results. The collective correlation factors and tracer correlation factors are used to calculate the vacancy-wind factors. Our results for vacancy-wind factors agree qualitatively with the simulation data when the frequency ratio (α) of structural and antistructural atoms jumps decreases up to the order of unity.
Relation
Defect and Diffusion Forum Vol. 251-252, p. 69-78
Relation
http://www.scientific.net/DDF.251-252
Date
2006
Publisher
Scitech Publications
Keyword(s)
intermetallics;  ordered alloys;  tracer diffusion;  chemical diffusion;  correlation factors;  six-jump-cycle;  vacancy-wind
Resource Type
journal article
Identifier
http://hdl.handle.net/1959.13/33716
Identifier
ISSN:1012-0386
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"Defect and Diffusion Forum"
 
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