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Homogeneous crystal nucleation in binary metallic meltsA method for calculating the homogeneous crystal nucleation frequency in binary metallic melts is developed. The free energy of crystallization is derived from regular solution models for the liquid and solid and is used, together with model-based estimates of the interfacial tension, to calculate the nucleation frequency from the classical theory. The method can account for the composition dependence of the maximum undercooling observed in a number of experiments on small droplet dispersions. It can also be used to calculate the driving force for crystal growth and to obtain more precise estimates of the homogeneous crystal nucleation frequency in glass-forming alloys. This method, although approximate, is simple to apply, and requires only knowledge of the phase diagram and a few readily available thermodynamic quantities as input data.
Document ID
19840034584
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Thompson, C. V.
(Harvard Univ. Cambridge, MA, United States)
Spaepen, F.
(Harvard University Cambridge, MA, United States)
Date Acquired
August 12, 2013
Publication Date
December 1, 1983
Publication Information
Publication: Acta Metallurgica
Volume: 31
ISSN: 0001-6160
Subject Category
Metallic Materials
Accession Number
84A17371
Funding Number(s)
CONTRACT_GRANT: NAS8-32691
Distribution Limits
Public
Copyright
Other

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