Thermomechanical analysis in directional solidification of CdTe

Frederick M. Carlson; Taipao Lee; John C. Moosbrugger; David J. Larson Jr.

doi:10.1117/12.244328

12 July 1996 Thermomechanical analysis in directional solidification of CdTe

Frederick M. Carlson, Taipao Lee, John C. Moosbrugger, David J. Larson Jr.

Proceedings Volume 2809, Space Processing of Materials; (1996) https://doi.org/10.1117/12.244328
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

Abstract

Thermoelastic calculations for CdTe grown by the vertical Bridgman method are presented. Finite element calculations are verified by some experimental data. Solidification interface velocity, charge temperature and stress distributions are computed for prescribed ampoule withdrawal rates and several ampoule support systems. The support systems include various materials and seed-wafer transition zone geometries. Crystal stress in excess of the critical resolved shear stress is used as the figure of merit to judge the performance of a particular system. Emphasis is focused on the transition region between the seed and wafer. A processing strategy is proposed and desirable support system characteristics are presented.

Citation Download Citation

Frederick M. Carlson, Taipao Lee, John C. Moosbrugger, and David J. Larson Jr. "Thermomechanical analysis in directional solidification of CdTe", Proc. SPIE 2809, Space Processing of Materials, (12 July 1996); https://doi.org/10.1117/12.244328

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