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Finite sample size effects in transformation kineticsThe effect of finite sample size on the kinetic law of phase transformations is considered. The case where the second phase develops by a nucleation and growth mechanism is treated under the assumption of isothermal conditions and constant and uniform nucleation rate. It is demonstrated that for spherical particle growth, a thin sample transformation formula given previously is an approximate version of a more general transformation law. The thin sample approximation is shown to be reliable when a certain dimensionless thickness is small. The latter quantity, rather than the actual sample thickness, determines when the usual law of transformation kinetics valid for bulk (large dimension) samples must be modified.
Document ID
19860032856
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Weinberg, M. C.
(California Institute of Technology Jet Propulsion Laboratory, Pasadena, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1985
Publication Information
Publication: Journal of Non-Crystalline Solids
Volume: 72
ISSN: 0022-3093
Subject Category
Thermodynamics And Statistical Physics
Accession Number
86A17594
Distribution Limits
Public
Copyright
Other

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