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Record Details

Record 36 of 5291
Detached Growth of Germanium by Directional Solidification
Author and Affiliation:
Palosz, W.(NASA Marshall Space Flight Center, Huntsville, AL, United States)
Volz, M.(NASA Marshall Space Flight Center, Huntsville, AL, United States)
Cobb, S.(NASA Marshall Space Flight Center, Huntsville, AL, United States)
Motakef, S.(Cape Simulations, Inc., Newton, MA, United States)
Szofran, F. R.(NASA Marshall Space Flight Center, Huntsville, AL, United States)
Abstract: Detached crystal growth technique (dewetting) offers improvement in the quality of the grown crystals by preventing sticking to the walls of the crucible and thus reducing the possibility of parasitic nucleation and formation of lattice defects upon cooling. One of the factors relevant for the phenomena is the pressure differential across the meniscus at the crystal-melt interface. We investigated this effect experimentally. The growth took place in closed ampoules under the pressure of an inert gas (forming gas: 96% Ar + 4% H2). The pressure above the melt was adjustable and allowed for a control of the pressure difference between the top and bottom menisci. The crystals were characterized, particularly by taking profilometer measurements along the grown crystals surface. The effects of the experimental conditions on the detachment were compared with those predicted based on the theory of Duffar et al.
Publication Date: Jan 01, 2004
Document ID:
20040111988
(Acquired Oct 01, 2004)
Subject Category: SOLID-STATE PHYSICS
Document Type: Preprint
Meeting Information: 14th International Conference on Crystal Growth in Conjunction with the 12th International Conference on Vapor Growth and Epitaxy (XIV ICCG/XII ICVGE; 9-13 Aug. 2004; Grenoble; France
Financial Sponsor: NASA Marshall Space Flight Center; Huntsville, AL, United States
Organization Source: NASA Marshall Space Flight Center; Huntsville, AL, United States
Description: 1p; In English; Original contains black and white illustrations
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: GERMANIUM; CRYSTAL DEFECTS; CRYSTAL GROWTH; DIRECTIONAL SOLIDIFICATION (CRYSTALS); RARE GASES; PROFILOMETERS; MELTS (CRYSTAL GROWTH); CRUCIBLES; AMPOULES
Availability Source: Other Sources
Availability Notes: Abstract Only
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