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Phase-field analysis of a ternary two-phase diffusion couple with multiple analytical solutions

✍ Scribed by J. Heulens; B. Blanpain; N. Moelans

Publisher
Elsevier Science
Year
2011
Tongue
English
Weight
890 KB
Volume
59
Category
Article
ISSN
1359-6454

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✦ Synopsis

Under certain conditions, there are multiple analytical solutions for the interface velocity in ternary two-phase diffusion couples. We have tackled this degeneracy problem by employing an isothermal phase-field model for diffusion couples that allows comparison with the analytical solutions. We find that, besides the three analytically predicted single-interface diffusion paths, a triple-interface diffusion path can also form. Furthermore, analysis of the phase-field simulation results shows that the Gibbs energies of both the bulk phases and the interfaces must be considered to determine uniquely the evolution of a diffusion couple, in case whether a single or multiple interfaces form.

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