A set of coupled diffusion equations is numerically solved to demonstrate that grain boundary diffusion is significantly enhanced when diffusing atomic species have dissimilar atomic hop frequencies in the bulk. The model is based on a rigorous treatment of two-component substitutional diffusion where vacancies are treated as an additional species. By examining the concentration fields and the eigenvalues of the diffusivity matrix, the origin of the enhanced grain boundary diffusion is explained in terms of the Kirkendall effect.
Skip Nav Destination
Research Article| September 05 2008
Theory of grain boundary diffusion induced by the Kirkendall effect
A. Van der Ven;
Hui-Chia Yu, A. Van der Ven, K. Thornton; Theory of grain boundary diffusion induced by the Kirkendall effect. Appl. Phys. Lett. 1 September 2008; 93 (9): 091908. https://doi.org/10.1063/1.2978161
Download citation file: