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Collective and tracer diffusion kinetics in the ternary random alloy

I V Belova1, A R Allnatt2 and G E Murch1

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In this study, collective and tracer diffusion kinetics is addressed for the ternary random alloy. A formal solution from the self-consistent theory of Moleko et al (Moleko L K, Allnatt A R and Allnatt E L 1989 Phil. Mag. A 59 141) is derived for collective diffusion and compared with the corresponding solution for the binary random alloy. Tracer diffusion in the ternary alloy is treated from the perspective of a special case of the quaternary random alloy. Results from Monte Carlo calculations for tracer and collective correlation factors (for the bcc ternary random alloy) are found to be in excellent agreement with this self-consistent theory but in only semi-quantitative agreement with the earlier theory of Manning (Manning J R 1971 Phys. Rev. B 4 1111).


PACS

82.80.-d Chemical analysis and related physical methods of analysis

66.30.Dn Theory of diffusion and ionic conduction in solids

Subjects

Condensed matter: structural, mechanical & thermal

Chemical physics and physical chemistry

Dates

Issue 28 (22 July 2002)

Received 29 April 2002

Published 5 July 2002



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