Journal of computational fluids engineering (한국전산유체공학회지)
- Volume 3 Issue 1
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- Pages.100-107
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- 1998
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- 1598-6071(pISSN)
Thermal Stresses Near the Crystal-Melt Interface During the Floating-Zone Growth of CdTe Under Microgravity Environment
미세중력장 CdTe 흘로우팅존 생성에서 결정체-용융액 계면주위의 열응력
Abstract
A numerical analysis of thermal stress over temperature variations near the crystal-melt interface is carried out for a floating-zone growth of Cadmium Telluride (CdTe). Thermocapillary convection determines crystal-melt interfacial shape and signature of temperature in the crystal. Large temperature gradients near the crystal-melt interface yield excessive thermal stresses in a crystal, which affect the dislocations of the crystal. Based on the assumption that the crystal is elastic and isotropic, thermal stresses in a crystal are computed and the effects of operating conditions are investigated. The results show that the extreme thermal stresses are concentrated near the interface of a crystal and the radial and the tangential stresses are the dominant ones. Concentrated heating profile increases the stresses within the crystal, otherwise, the pulling rate decreases the stresses.
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