Effect of Surface Free Energy Anisotrophy on Dendrite Tip Shape

Published

August 1, 1999

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

Pub Type

Conferences

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 October 22, 2025)