Morphological instability of a solid sphere of dilute ternary alloy growing by diffusion from its melt

作者：Colin Jerome^*; Voorhees Peter W

来源：Journal of Crystal Growth, 2016, 448: 17-20.

DOI：10.1016/j.jcrysgro.2016.03.041

• Crystal morphology
• Growth models
• Morphological stability
• Alloys

The diffusion-limited growth of an initially spherical particle of dilute ternary alloy in contact with its melt has been studied from a theoretical point of view and the effects of interface kinetics and multicomponent diffusion have been characterized on the development of a shape perturbation of the sphere. When both concentrations of the diffusing species are imposed in the far-field, the different radii related to the absolute and relative stability of the particle with respect to the development of spherical harmonics have been determined when a linear kinetics law is considered for the solid/liquid interface. The development of the shape fluctuations of the sphere has been also characterized when the flux of both species are set in the far-field.

• 出版日期2016-8-15
• 单位西北大学