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Free dendritic growth in viscous melts - CyclohexanolExperiments were carried out to measure the growth speed, V, and dendritic tip radius, R, of highly purified cyclohexanol. The data show that VR-squared = constant over the entire experimentally observed supercooling range, Delta T is between 0.1 and 1 K. The stability parameter estimated from this result indicates that sigma(asterisk) = 0.027, a value in good agreement with the values of sigma(asterisk) found for the cubic plastic crystals succinonitrile pivalic acid. Cyclohexanol differs from other carefully measured plastic crystals in that the viscosity of its melt at the melting point is about 20 times higher, so gravity-induced convection remains weak even at small supercoolings.
Document ID
19900032230
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Singh, N. B.
(Westinghouse Research and Development Center Pittsburgh, PA, United States)
Glicksman, M. E.
(Rensselaer Polytechnic Institute, Troy, NY, United States)
Date Acquired
August 14, 2013
Publication Date
November 1, 1989
Publication Information
Publication: Journal of Crystal Growth
Volume: 98
Issue: 3
ISSN: 0022-0248
Subject Category
Solid-State Physics
Accession Number
90A19285
Funding Number(s)
CONTRACT_GRANT: NAG3-333
Distribution Limits
Public
Copyright
Other

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