Paper Title:
Vacancy-Wind Factors and Collective Correlation Factors in Nonstoichiometric B2 Intermetallic Compounds
  Abstract

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.

  Info
Periodical
Defect and Diffusion Forum (Volumes 251-252)
Edited by
David J. Fisher
Pages
69-78
DOI
10.4028/www.scientific.net/DDF.251-252.69
Citation
K.L. Gosain, D.K. Chaturvedi, I. V. Belova, G. E. Murch, "Vacancy-Wind Factors and Collective Correlation Factors in Nonstoichiometric B2 Intermetallic Compounds", Defect and Diffusion Forum, Vols. 251-252, pp. 69-78, Mar. 2006
Online since
March 2006
Price
US$ 28,-
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