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Solid/liquid interfacial free energies in binary systemsDescription of a semiquantitative technique for predicting the segregation characteristics of smooth interfaces between binary solid and liquid solutions in terms of readily available thermodynamic parameters of the bulk solutions. A lattice-liquid interfacial model and a pair-bonded regular solution model are employed in the treatment with an accommodation for liquid interfacial entropy. The method is used to calculate the interfacial segregation and the free energy of segregation for solid-liquid interfaces between binary solutions for the (111) boundary of fcc crystals. The zone of compositional transition across the interface is shown to be on the order of a few atomic layers in width, being moderately narrower for ideal solutions. The free energy of the segregated interface depends primarily upon the solid composition and the heats of fusion of the component atoms, the composition difference of the solutions, and the difference of the heats of mixing of the solutions.
Document ID
19740029552
Document Type
Reprint (Version printed in journal)
Authors
Nason, D. (Stanford University Stanford, Calif.; New England, University, Armidale, New South Wales, Australia)
Tiller, W. A. (Stanford University Stanford, Calif., United States)
Date Acquired
August 7, 2013
Publication Date
October 1, 1973
Publication Information
Publication: Surface Science
Volume: 40
Issue: 1, Oc
Subject Category
PHYSICS, SOLID-STATE
Report/Patent Number
AFOSR-74-0941TR
AD-781566
Funding Number(s)
CONTRACT_GRANT: NGR-05-020-549
CONTRACT_GRANT: AF-AFOSR-68-1360
Distribution Limits
Public
Copyright
Other