Competition between Kirkendall and Frenkel effects during multicomponent interdiffusion process

• Published in: Physica A Vol. 403; pp. 29 - 34
• Main Author: Wierzba, Bartek
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-06-2014
• Subjects: Competition; Diffusion coefficient; Evolution; Frenkel effect; Interdiffusion; Kirkendall effect; Statistical mechanics; Vacancies; Voids; Voids; Kirkendall effect; Interdiffusion; Vacancies; Frenkel effect
• ISSN: 0378-4371; 1873-2119
• DOI: 10.1016/j.physa.2014.02.014

In this work the competition between Kirkendall effect caused by intrinsic diffusion coefficients and vacancy generation and evolution is discussed. The proposed approach is based on the bi-velocity (Darken) approach which combines the Darken and Brenner concepts that the volume velocity is essential in defining the local material velocity at non-equilibrium. The model is formulated for arbitrary systems however for discussion only the binary system is presented. The distributions of (1) components, (2) vacancy and (3) voids radius over the distance are presented.
•Competition between Kirkendall and Frenkel effects is discussed.•Approach is based on the bi-velocity (Darken) approach.•The distributions of components, vacancy and voids radius are presented.