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Morphological Stability of a Binary Alloy: Thermodiffusion and Temperature-Dependent Diffusivity



S R. Vanaerenbergh, Sam R. Coriell, Geoffrey B. McFadden


The effect of the temperature dependent solute diffusion coefficient on the morphological stability of a binary alloy during directional solidification is treated by a linear stability analysis. The Soret effect (thermodiffusion) is also included in the analysis. Specific calculations are carried out for a tin alloy containing silver for which the diffusion coefficient has a linear dependence on temperature. Although the temperature dependence of the diffusion coefficient has little effect on the critical concentration for the onset of morphological stability, it causes a significant change in the wavelength at the onset of instability.
Journal of Crystal Growth
No. 4


alloy solidification, Soret effect, temperature-dependent diffusivity, tin-silver


Vanaerenbergh, S. , Coriell, S. and McFadden, G. (2001), Morphological Stability of a Binary Alloy: Thermodiffusion and Temperature-Dependent Diffusivity, Journal of Crystal Growth (Accessed June 16, 2024)


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Created February 28, 2001, Updated October 12, 2021