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Interface Stability During Rapid Directional Solidification

Published online by Cambridge University Press:  26 February 2011

David E. Hoglund  and
Michael J. Aziz
David E. Hoglund
Affiliation:
Division of Applied Sciences, Harvard University, Cambridge, MA 02138
Michael J. Aziz
Affiliation:
Division of Applied Sciences, Harvard University, Cambridge, MA 02138
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Abstract

At the solidification velocities observed during pulsed laser annealing, the planar interface between solid and liquid is stabilized by capillarity and nonequilibrium effects such as solute trapping. We used Rutherford backscattering and electron microscopy to determine the nonequilibrium partition coefficient and critical concentration for breakdown of the planar interface as a function of interface velocity for Sn-implanted silicon. This allows us to test the applicability of the Mullins- Sekerka stability theory to interfaces not in local equilibrium and to test the Coriell-Sekerka and other theories for oscillatory instabilities.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 205: Symposium F – Kinetics of Phase Transformations , 1990 , 325
Copyright
Copyright © Materials Research Society 1992

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