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Growth-speed dependence of primary arm spacings in directionally solidified Pb-10 wt pct SnThe dependence of primary arm spacings on growth speed has been investigated for cellular and dendritic arrays in directionally solidified Pb-10 wt pct Sn. The spatial arrangements of cells and dendrites, as given by their coordination number, are not very different from each other. The primary arm spacing maxima and the cell-to-dendrite transition appear to be strongly influenced by the magnitude of the solute partition coefficient (k). The planar-to-cellular transition in Pb-Sn (k = 0.50) is supercritical as compared to the subcritical behavior reported in Al-Cu (k = 0.14) and succinonitrile-acetone (k = 0.1).
Document ID
19920043902
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Chopra, M. A.
(IBM Corp. Austin, TX, United States)
Tewari, S. N.
(Cleveland State University OH, United States)
Date Acquired
August 15, 2013
Publication Date
October 1, 1991
Publication Information
Publication: Metallurgical Transactions A - Physical Metallurgy and Materials Science
Volume: 22A
ISSN: 0360-2133
Subject Category
Metallic Materials
Accession Number
92A26526
Funding Number(s)
CONTRACT_GRANT: NCC3-95
Distribution Limits
Public
Copyright
Other

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