MCT crystal growth. Final report

Technical Report · Mon Feb 01 00:00:00 EST 1988

OSTI ID:5310754

Baird, J K

Convection and segregation in directional solidification and crystal growth by the Bridgman-Stockbarger technique are traditionally treated by assuming axisymmetric thermal condition on the ampoule wall. It is, however, difficult to achieve such a condition in an experimental setup. Any deviation from an axisymmetric temperature field on the wall of a vertical ampoule represents a horizontal temperature gradient. The horizontal density gradient that results from thermal expansion in the melt under this condition must lead on earth to some buoyance-driven convection, no matter what the axial (vertical) temperature distribution that is imposed on the melt. The magnitude of such convective flows for conditions representative of the MSFC mercury-cadmium-telluride (MCT) Bridgman setup is studied.

• Research Organization: Alabama Univ., Huntsville (USA)
• OSTI ID: 5310754
• Report Number(s): N-88-19318; NASA-CR-179297; NAS-1.26:179297
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CADMIUM TELLURIDES
CRYSTAL GROWTH
MERCURY TELLURIDES
BRIDGMAN METHOD
CONVECTION
PROGRESS REPORT
SOLIDIFICATION
TEMPERATURE DISTRIBUTION
TEMPERATURE GRADIENTS
THERMAL EXPANSION
CADMIUM COMPOUNDS
CHALCOGENIDES
CRYSTAL GROWTH METHODS
DOCUMENT TYPES
ENERGY TRANSFER
EXPANSION
HEAT TRANSFER
MASS TRANSFER
MERCURY COMPOUNDS
PHASE TRANSFORMATIONS
TELLURIDES
TELLURIUM COMPOUNDS
360601* - Other Materials- Preparation & Manufacture