Atomistic origin of the thermodynamic activation energy for self-diffusion and order-order relaxation in intermetallic compounds I: analytical approach

Title: Atomistic origin of the thermodynamic activation energy for self-diffusion and order-order relaxation in intermetallic compounds I: analytical approach
Creator: Sowa, P.; Biborski, A.; Kozłowski, M.; Kozubski, R.; Belova, I. V.; Murch, G. E.
Relation: ARC
Relation: Philosophical Magazine Vol. 97, Issue 17, p. 1361-1374
Publisher Link: http://dx.doi.org/10.1080/14786435.2017.1302101
Publisher: Taylor & Francis
Resource Type: journal article
Date: 2017
Description: The general state of knowledge of diffusion and order-order relaxation in a long-range ordered system is summarised. A consistent atomistic description of self-diffusion and the order-order relaxation process is discussed in terms of effective atomic jump frequencies and the current degree of chemical long-range order. It is demonstrated that the thermodynamic activation energies of self-diffusion and the order-order relaxation can be expressed in terms of the activation energies of more elementary processes. The derived expressions differ from each other indicating that although both processes are controlled by the same vacancy-mediated elementary atomic jumps, the values of their thermodynamic activation energies can be different.
Subject: self-diffusion; relaxation; intermetallics
Identifier: http://hdl.handle.net/1959.13/1393258
Identifier: uon:33511
Identifier: ISSN:1478-6435
Language: eng
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