Interface Morphology During Crystal Growth: Effects of Anisotropy and Fluid Flow

Published

August 12, 1998

Author(s)

Sam R. Coriell, B T. Murray, A A. Chernov, Geoffrey B. McFadden

Abstract

We treat the effect of shear flows on the morphological stability of a crystal growing from solution by a step mechanism at a given constant velocity. We carry out some calculations for a shear flow that is sinusoidal in time.The interaction of fluid flow with the crystal-melt interface plays an important role in determining the properties of the solidified material. Convection in the melt and interface instability may both produce solute inhomogeneities. In the absence of fluid flow, the conditions for the onset of morphological instability of isotropic materials are well established. However, the coupling between morphological instability and fluid flow can be complicated; interfacial instabilities depend on temperature and solute gradients which may be strongly influenced by the flow field. The flow field, in turn, may be influenced by the morphology of the interface.

Proceedings Title

Proceedings of the Fourth Microgravity Fluid Physics and Transport Phenomena Conference

Conference Dates

August 12-14, 1998

Conference Location

Undefined

Conference Title

Microgravity Fluid Physics and Transport Phenomena Conference

Pub Type

Conferences

Keywords

Anisotropy, fluid flow, morphological stability, shear flow, solidification, step growth

Citation

Coriell, S. , Murray, B. , Chernov, A. and McFadden, G. (1998), Interface Morphology During Crystal Growth: Effects of Anisotropy and Fluid Flow, Proceedings of the Fourth Microgravity Fluid Physics and Transport Phenomena Conference, Undefined (Accessed December 26, 2024)