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Convective and Morphological Instabilities During Crystal Growth

Published

Author(s)

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

Abstract

During crystal growth or solidification of a binary alloy from a liquid phase, temperature and solute gradients are inherently present and can give rise to fluid flow in the melt. The interaction of fluid flow with the crystal-meltinterface plays an important role in determining the properties of the solidified material. Convection in the melt and interface instability may both produce solute inhomogeneities. The coupling between morphological instability and fluid flow can be complicated; interfacial instabilities depend on temperature and solute gradients that may be strongly influenced by the flow field. The flow field, in turn, may be influenced by the morphology of the interface. Examples of the effects of coupling on the stability of the system are discussed.
Proceedings Title
Proceedings of the 2002 NASA Microgravity Materials Science Conference
Conference Dates
June 24-26, 2002
Conference Title
NASA Microgravity Materials Science Conference

Keywords

directional solidification, fluid flow, morphological stability, solute inhomogeneities, vicinal interface

Citation

McFadden, G. , Coriell, S. and Murray, B. (2002), Convective and Morphological Instabilities During Crystal Growth, Proceedings of the 2002 NASA Microgravity Materials Science Conference (Accessed June 21, 2024)

Issues

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Created June 1, 2002, Updated February 17, 2017