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In Situ Observations of Interfacial Instability During Growth of Lead Bromide Crystals

Published online by Cambridge University Press:  10 February 2011

S. S. Mani ,
N. B. Singh ,
S. R. Conrell ,
M. E. Glicksman ,
R. DeWitt ,
G. J. Santoro  and
W. M. B. Duval
S. S. Mani
Affiliation:
Westinghouse STC, Pittsburgh, PA 15235
N. B. Singh
Affiliation:
Westinghouse STC, Pittsburgh, PA 15235
S. R. Conrell
Affiliation:
NIST, Gaithersburg, MD 20899
M. E. Glicksman
Affiliation:
RPI, Troy, NY 12180
R. DeWitt
Affiliation:
NASA, Lewis Research Center, Cleveland, OH 44135
G. J. Santoro
Affiliation:
NASA, Lewis Research Center, Cleveland, OH 44135
W. M. B. Duval
Affiliation:
NASA, Lewis Research Center, Cleveland, OH 44135
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Abstract

Effects of convective mixing on the concentration homogeneity of the crystal has been demonstrated. Insitu observations of the solid liquid interface shape during crystal growth are presented which can be used to optimize the dopant distribution. Observations of the interface during growth are discussed varying the parameters in a controlled manner to minimize the thermosolutal effects. It has been observed that beyond a critical velocity for the particular dopant level, the interface shape changes. The change in the interface shape can be related to the fluid flow in the melt. Two different instability regions, namely convective and morphological are addressed. Experimentally observed result are compared with the existing convecto-diffusive theories.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 417: Symposium EE – Optoelectronic Materials-Ordering, Composition Modulation, and Self-Assembled … , 1995 , 381
Copyright
Copyright © Materials Research Society 1996

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References

1. Singh, N. B. and Glicksman, M. E., Mat Letters, 5 (1987), p. 453.Google Scholar
2. Singh, N. B. et al, J of Crystal Growth, 87 (1988), p. 113.Google Scholar
3. Singh, N. B., et al ACCG-8 meeting, Vail, CO (1990).Google Scholar
4. Favier, J. J., Acta Met., 29 (1981), p. 204.Google Scholar
5. Coriell, S. R., Murray, B. T., McFadden, G. B., and Leorentz, K., in Free Boundaries in Viscous Flows, The IMA Volumes in Mathematics and it's Applications, Vol 61, Ed. Brown, R. A and Davis, S. H. (Springer Verlag, New York, 1994) p. 99–112.Google Scholar