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Proceedings Paper

Numerical modeling of HgCdTe solidification: effects of phase diagram double-diffusion convection and microgravity level
Author(s): Andris V. Bune; Donald C. Gillies; Sandor L. Lehoczky
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Paper Abstract

A numerical model of HgCdTe solidification was implemented using finite the element code FIDAP. Model verification was done using both experimental data and numerical test problems. The model was used to eluate possible effects of double- diffusion convection in molten material, and microgravity level on concentration distribution in the solidified HgCdTe. Particular attention was paid to incorporation of HgCdTe phase diagram. It was found, that below a critical microgravity amplitude, the maximum convective velocity in the melt appears virtually independent on the microgravity vector orientation. Good agreement between predicted interface shape and an interface obtained experimentally by quenching was achieved. The results of numerical modeling are presented in the form of video film.

Paper Details

Date Published: 7 July 1997
PDF: 11 pages
Proc. SPIE 3123, Materials Research in Low Gravity, (7 July 1997); doi: 10.1117/12.277727
Show Author Affiliations
Andris V. Bune, NASA Marshall Space Flight Ctr. (United States)
Donald C. Gillies, NASA Marshall Space Flight Ctr. (United States)
Sandor L. Lehoczky, NASA Marshall Space Flight Ctr. (United States)

Published in SPIE Proceedings Vol. 3123:
Materials Research in Low Gravity
Narayanan Ramachandran, Editor(s)

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