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Solidification Interface Morphologies in Zone Melting Recrystallization

Published online by Cambridge University Press:  28 February 2011

J. S. Im,
C. V. Thompson and
H. Tomita
J. S. Im
Affiliation:
Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139;
C. V. Thompson
Affiliation:
Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139;
H. Tomita
Affiliation:
Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139., Sony Co. Research Center, Yokohama, Japan.)
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Abstract

Using in situ optical microscopy we have studied the morphology of the liquid-solid interface during zone melting recrystallization. We have observed a variety of interface morphologies, each of which corresponds to specific types and distributions of subboundaries in the solidified material. We have also observed a variety of morphologies for stationary interfaces. We propose that perturbations in both the stationary and moving liquid-solid interfaces develop, at least in part, due to the spatial gradient in the radiation intensity in the region of the interface.

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