Abstract
The atomic mechanism of self-diffusion in a face-centered cubic structure (exemplified by aluminum) is simulated by the molecular-dynamics method without resorting to a priori information. No confirmation of vacancy-jump mechanisms of diffusion has been obtained. The cooperative mechanism of diffusion suggested previously by Khait and Klinger and based on the assumption of possible local melting near vacancies (within one-two nearest coordination shells) appears to be valid. As a result, the preexponential factor proves to depend on the temperature and heat of melting, and the exponential factor depends on the heat of melting and the current temperature.
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References
B. S. Bokshtein, Diffusion in Metals [in Russian] (Metallurgiya, Moscow, 1978).
Ya. D. Frenkel’, Introduction to the Theory of Metals (Fizmatgiz, Moscow, 1958).
Y. L. Khait, Physica A (Amsterdam) 103, 1 (1980).
M. M. Klinger, Metallofizika (Kiev) 6(5), 11 (1984).
V. M. Dyadin and V. G. Chudinov, Available from VINITI, No. 1537-V 91 (1991).
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Translated from Zhurnal Tekhnichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) Fiziki, Vol. 70, No. 7, 2000, pp. 133–135.
Original Russian Text Copyright © 2000 by Chudinov.
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Chudinov, V.G. Cooperative mechanism of self-diffusion in metals. Tech. Phys. 45, 945–947 (2000). https://doi.org/10.1134/1.1259755
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DOI: https://doi.org/10.1134/1.1259755