Modified Model of Diffusion by Interstitial-Vacancy Pairs

Details Modified Model of Diffusion by Interstitial-Vacancy Pairs Modified Model of Diffusion by Interstitial-Vacancy Pairs

Feb 1973

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973phrvb...7.1341w&link_type=abstract

Physical Review B, vol. 7, Issue 4, pp. 1341-1352

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16

Scientific paper

In order to adequately describe the diffusion of mercury in lead, the interstitial-vacancy pair model is redeveloped in a form which only allows impurity jumps which create or annihilate the pair and nearest-neighbor exchanges with the vacancy by solvent atoms, but in which the correlation coefficients for these three jump types are calculated explicitly. These calculations are done numerically for a range of jump frequencies using the formalism of Howard. In this new model, expressions are developed for the diffusivity, correlation coefficient, and enhancement of the solvent diffusivity which show behavior similar to the older models except that now f0

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