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Numerical simulations of inductive-heated float-zone growthThe present work provides an improved fluid flow and heat-transfer modeling of float-zone growth by introducing a RF heating model so that an ad hoc heating temperature profile is not necessary. Numerical simulations were carried out to study the high-temperature float-zone growth of titanium carbide single crystal. The numerical results showed that the thermocapillary convection occurring inside the molten zone tends to increase the convexity of the melt-crystal interface and decrease the maximum temperature of the molten zone, while the natural convection tends to reduce the stability of the molten zone by increasing its height. It was found that the increase of induced heating due to the increase of applied RF voltage is reduced by the decrease of zone diameter. Surface tension plays an important role in controlling the amount of induced heating. Finally, a comparison of the computed shape of the free surface with a digital image obtained during a growth run showed adequate agreement.
Document ID
19930030853
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Chan, Y. T.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Choi, S. K.
(Scientific Research Associates, Inc. Glastonbury, CT, United States)
Date Acquired
August 16, 2013
Publication Date
October 15, 1992
Publication Information
Publication: Journal of Applied Physics
Volume: 72
Issue: 8
ISSN: 0021-8979
Subject Category
Solid-State Physics
Accession Number
93A14850
Funding Number(s)
CONTRACT_GRANT: NAS8-38487
Distribution Limits
Public
Copyright
Other

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