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Morphological instability in a float zoneThis paper examines the morphological instability of the freezing interface of the float zone in a crystal sheet for which the height of the liquid zone L = Lf + Lm (where Lf and Lm are the planar positions of the solidifying and melting interfaces) is smaller than the width and the thickness of the sheet. The Lf and Lm positions are calculated, and basic state concentration profiles are determined for a planar interfacial system. A linear stability analysis of this system is performed showing that the growth rate of disturbances is a modified version of the growth rate for a directional solidification system. It was found that shorter melt zone configurations are less susceptible to long wavelength morphological instability, indicating that, to suppress morphological instability in a float zone system, it is necessary to decrease the liquid zone height.
Document ID
19910037503
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Humphreys, Laura B.
(Akron Univ. Akron, OH, United States)
Heminger, John A.
(Akron Univ. Akron, OH, United States)
Young, Gerald W.
(Akron, University OH, United States)
Date Acquired
August 15, 2013
Publication Date
February 1, 1990
Publication Information
Publication: Journal of Crystal Growth
Volume: 100
Issue: 2-Jan
ISSN: 0022-0248
Subject Category
Materials Processing
Accession Number
91A22126
Funding Number(s)
CONTRACT_GRANT: NSF DMS-86-04047
CONTRACT_GRANT: NSF DMS-89-57534
CONTRACT_GRANT: NCC3-104
Distribution Limits
Public
Copyright
Other

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