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Effect of anisotropic thermal conductivity on the morphological stability of a binary alloyA linear morphological stability analysis is presented for a planar interface during unidirectional solidification of a binary alloy, in the case of a crystal having an anisotropic thermal conductivity. A dispersion relation shows that the onset of instability depends on the orientation of the growth direction with respect to principal crystallographic axes and on the orientation of the wavevector of the perturbation. The onset of instability can be either oscillatory (traveling waves) or nonoscillatory in time. For growth along a principal axis of the crystal there is an exchange of stabilities, and the onset of instability is nonoscillatory.
Document ID
19910037514
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Coriell, S. R.
(National Inst. of Standards and Technology Gaithersburg, MD, United States)
Mcfadden, G. B.
(NIST Gaithersburg, MD, United States)
Sekerka, R. F.
(Carnegie-Mellon University Pittsburgh, PA, United States)
Date Acquired
August 15, 2013
Publication Date
March 1, 1990
Publication Information
Publication: Journal of Crystal Growth
Volume: 100
Issue: 3 Ma
ISSN: 0022-0248
Subject Category
Solid-State Physics
Accession Number
91A22137
Funding Number(s)
CONTRACT_GRANT: NSF DMR-84-09397
Distribution Limits
Public
Copyright
Other

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