The Kirkendall effect in the phase field crystal model

The Kirkendall effect stems from unequal mobilities of atomic species, which give rise to a net flux of vacancies during interdiffusion in substitutional alloys. In this work, we study a simple binary phase field crystal model to include unequal atomic mobilities and demonstrate that the model captu...

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Bibliographic Details
Published in:Philosophical magazine (Abingdon, England) England), 2011-01, Vol.91 (1), p.151-164
Main Authors: Elder, K.R., Thornton, K., Hoyt, J.J.
Format: Article
Language:English
Subjects:
Alloys
Atomic mobilities
binary phase field crystal model
computer simulation
crystal growth
Crystals
Flux
Grain boundaries
Kirkendall effect
microstructure formation
Stems
Vacancies
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Summary:The Kirkendall effect stems from unequal mobilities of atomic species, which give rise to a net flux of vacancies during interdiffusion in substitutional alloys. In this work, we study a simple binary phase field crystal model to include unequal atomic mobilities and demonstrate that the model captures many phenomena associated with the Kirkendall effect, including the center of mass motion, vacancy supersaturation that can lead to pore formation, and enhanced vacancy concentration near grain boundaries.
ISSN:1478-6435
1478-6443
DOI:10.1080/14786435.2010.506427