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Quantitative Evaluation of the Interfacial Free Energies at A Solid-Liquid Lamellar Eutectic Interface

Published online by Cambridge University Press:  15 February 2011

W. F. Kaukler  and
J. W. Rutter
W. F. Kaukler
Affiliation:
Universities Space Research AssociationSpace Sciences Laboratory NASA, Marshall Space Flight CenterAlabama, USA35812
J. W. Rutter
Affiliation:
Department of Metallurgy and Materials ScienceUniversity of TorontoToronto, Ontario, Canada M5S IA4
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Abstract

The solid-liquid interfacial free energies of each of the individual phases comprising the eutectic system, Carbon Tetrabromide-Hexachloroethane, were measured as a function of composition using a “grain boundary groove” technique. Thermodynamic data were combined with groove shape measurements made from high resolution optical photomicrographs of the solid-liquid interfaces to give the interfacial free energy data. An interfacial free energy balance at the eutectic trijunction was performed to obtain all the forces acting on that point. The three interphase interfacial free energies at the eutectic trijunctions as well as a solid-solid phase boundary torque were evaluated.

It was found that the solid-liquid interfacial free energies of the two phases of the eutectic could be evaluated from photomicrographs of growing or stationary eutectic interfaces. In addition, it was found that for a substantial range of freezing conditions the eutectic interface shape can be predicted from a knowledge of the interfacial free energies alone.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 12: Symposium L – In Situ Composites IV , 1981 , 305
Copyright
Copyright © Materials Research Society 1982

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References

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