Effect of steady crucible rotation on segregation in high-pressure vertical Bridgman growth of cadmium zinc telluride

Andrew Yeckel, F. Patrick Doty, Jeffrey J. Derby

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56 Scopus citations

Abstract

Three-dimensional axisymmetric, time-dependent simulations of the high-pressure vertical Bridgman growth of large-diameter cadmium zinc telluride are performed to study the effect of steady crucible rotation on axial and radial segregation in the grown crystal. The model includes details of heat transfer, melt convection, solid-liquid interface shape, and pseudo-binary zinc segregation. Imposing a moderate rotation rate of 10 rpm on the system slightly improves axial segregation but makes radial segregation much worse. Moreover, values of dimensionless thermal Rossby and Taylor numbers calculated for this system indicate that the baroclinic instability may occur at the rotation rates studied.

Original languageEnglish (US)
Pages (from-to)87-102
Number of pages16
JournalJournal of Crystal Growth
Volume203
Issue number1
DOIs
StatePublished - May 1999

Bibliographical note

Funding Information:
This work was supported in part by Sandia National Laboratory under contract SNL/LG-5513 and by the National Aeronautics and Space Administration, Microgravity Materials Science. Computational resources were provided by the University of Minnesota Supercomputing Institute and the Army High Performance Computing Research Center under the auspices of the Department of the Army, Army Research Laboratory cooperative agreement DAAH04-95-2-0003/contract DAAH04-95-C-0008, the content of which does not necessarily reflect the position or policy of the government, and no official endorsement should be inferred.

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