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Coarsening in binary solid-liquid mixturesA theory of Ostwald ripening has been developed for a solid-liquid mixture cosisting of a low volume fraction array of spherical solid particles in a liquid wherein the coarsening process proceeds via the transport of both heat and mass. It is found that the simultaneous transport of heat and mass during ripening does not alter the exponents of the temporal power laws governing the ripening process from their classical values but does alter the amplitudes of these power laws. The growth rate of the cube of the average particle radius, the rate constant, is found to depend both on the alloy solute concentration and the ratio of the thermal to solutal diffusivities. In most metallic systems, a large decrease in the rate constant can be expected with small additions of solute to a pure metal. Possible extensions of this theory to the analogous problem of ripening in isothermal ternary alloys are also discussed.
Document ID
19900035821
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Voorhees, P. W.
(Northwestern University Evanston, IL, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1990
Publication Information
Publication: Metallurgical Transactions A - Physical Metallurgy and Materials Science
Volume: 21A
ISSN: 0360-2133
Subject Category
Metallic Materials
Accession Number
90A22876
Distribution Limits
Public
Copyright
Other

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