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Dynamics of Rapid Solidification in Silicon

Published online by Cambridge University Press:  26 February 2011

P. S. Peercy ,
Michael O. Thompson  and
J. Y. Tsao
P. S. Peercy
Affiliation:
Sandia National Laboratories Albuquerque, New Mexico 87185
Michael O. Thompson
Affiliation:
Department of Materials Science Cornell University, Ithaca, New York
J. Y. Tsao
Affiliation:
Department of Materials Science Cornell University, Ithaca, New York
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Abstract

Real-time techniques were used to study rapid melt and solidification dynamics in silicon. In crystalline Si, the interface response function was characterized and found to be asymmetric for large deviations from the melting temperature, which will require reevaluation of conventional transition state treatments of melt and solidification. In amorphous Si, the mechanism of explosive crystallization was studied. The explosive transformation is mediated by a buried liquid layer, and detailed measurements have led to the suggestion that polycrystalline Si nucleates at the moving liquid-amorphous interface. For certain conditions, this process could yield fine-grained polycrystalline Si; for other conditions it permits epitaxial regrowth from the underlying crystalline Si for maximum melt thickness much less than the original amorphous layer thickness.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 80: Symposium G – Science and Technology of Rapidly Quenched Alloys , 1986 , 39
Copyright
Copyright © Materials Research Society 1987

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