Diffusion Equations for Early Stages of Solid Solutions Decay Based on the Markovian Theory of Random Walk

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Examination was made of the early stages of binodal or spinodal solid solutions decay connected with the growth of local zones of concentration fluctuations. The theory of Markovian process of random walk of the individual atoms describes how particle transport with short diffusion paths causes the growth of these zones. The resulting equation predicts the growth and transformation of initial zones of concentration fluctuations into growing clusters with surface boundary or formation of the quasiperiodic concentration distribution inherent in spinodal decomposition.

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74-80

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February 2018

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© 2018 Trans Tech Publications Ltd. All Rights Reserved

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[1] W.A. Soffa, D.E. Laughlin, Diffusional Phase Transformations in the Solid State, in: D.E. Laughlin, K. Hono (Eds. ), Physical Metallurgy. Vol. 1, fifth ed., Elsevier B.V., 2015, p.851 – 1020.

DOI: 10.1016/b978-0-444-53770-6.00008-3

Google Scholar

[2] K.P. Gurov, B.A. Kartashkin, Y.E. Ugaste, Interdiffusion in Multiphase Metallic Systems, Nauka, k Moscow, (1981).

Google Scholar

[3] P. Haasen, V. Gerold, R. Wagner (Eds. ), Decomposition of Alloys: The Early Stages: Proc. of the 2nd Acta-Scripta Metallurgica Conference, Pergamon Press, (1984).

Google Scholar

[4] N.V. Karyakin, V.B. Fedoseev, Free energy of a solid solution with solute clusters, The Physics of Metals and Metallography. 91(2) (2001) 126-129.

Google Scholar

[5] E.W. Montroll, J.I. Lebowitz (Eds. ) Studies in Statistical Mechanics, Vol. XI, Amsterdam, North-Holland PC, (1984).

Google Scholar

[6] V. Uchaikin, Self-similar anomalous diffusion and Levy-stable laws, Physics-Uspekhi. 46(8) (2003) 821-849.

DOI: 10.1070/pu2003v046n08abeh001324

Google Scholar

[7] V.I. Tikhonov, M.A. Mironov, Markov Processes, Sovetskoe Radio, Moskow, 1977. (in Russian).

Google Scholar

[8] V.P. Skripov, A.V. Skripov, Spinodal decomposition (phase transitions via unstable states), Soviet Physics Uspekhi. 128(2) (1979) 193-231. (in Russian).

DOI: 10.1070/pu1979v022n06abeh005571

Google Scholar

[9] A.A. Samarsky, Introduction to Difference Scheme Theory, Nauka, Moscow, 1971. (in Russian).

Google Scholar