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Effect of Surface Free Energy Anisotrophy on Dendrite Tip Shape

Published

Author(s)

Richard J. Braun, J Zhang, John W. Cahn, Geoffrey B. McFadden, A A. Wheeler

Abstract

We describe a mean field, free energy model that allows the computation of realistic phase diagrams for a particular set of ordering transitions in face-centered-cubic (FCC) binary alloys.  The model is based on a sixth-order Landau expansion of the free-energy function in terms of the three noncouserved order parametrs that describe ordering on the underlying FCC lattice.  When combined with appropriate gradient-energy terms, this model will allow the self-consistent calculation of energetic and kinetic anisotropies of phase boundaries in future work.
Proceedings Title
Proceedings of the Workshop on Interfaces for the 21st Century
Conference Dates
August 16-18, 1999
Conference Location
-, 1, USA
Conference Title
Workshop on Interfaces for the Twenty-First Century

Keywords

binary alloy, diffuse interface, ideal solution, Landau expansion, order-disorder transitions, phase diagram

Citation

Braun, R. , Zhang, J. , Cahn, J. , McFadden, G. and Wheeler, A. (1999), Effect of Surface Free Energy Anisotrophy on Dendrite Tip Shape, Proceedings of the Workshop on Interfaces for the 21st Century, -, 1, USA (Accessed June 17, 2024)

Issues

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Created July 31, 1999, Updated October 12, 2021