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Morphological Stability of a Binary Alloy: Temperature-Dependent Diffusivity

Published

Author(s)

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

Abstract

The effect of the temperature dependence of the diffusion coefficient on the morphological stability of a binary alloy during directional solidification is treated by a linear stability analysis. The Soret effect 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 effect on the wavelength at the onset of instability.
Citation
NIST Interagency/Internal Report (NISTIR) - 6586
Report Number
6586

Keywords

alloysolidification, soret effect, temperature-dependent diffusivity, tin-silver

Citation

Coriell, S. , McFadden, G. and Vanaerenbergh, S. (2000), Morphological Stability of a Binary Alloy: Temperature-Dependent Diffusivity, NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD (Accessed February 23, 2024)
Created October 31, 2000, Updated October 12, 2021