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Anisotropy of interfaces in an ordered alloy: a multiple-order-parameter model

Record type: Article

A multiple-order-parameter theory of ordering on a binary face-centred-cubic (FCC) crystal lattice is developed, and adapted to provide a continuum formulation that incorporates the underlying symmetries of the FCC crystal in both the bulk and gradient-energy terms of the free energy. The theory is used to compute the orientation dependence of the structure and energy of interphase and antiphase boundaries. The structure of these interfaces compares favourably with previous lattice calculations by Kikuchi & Cahn (1962, 1979). Anisotropy is a natural consequence of the lattice calculation and the multiple-order-parameter continuum formulation presented here. This is in contrast to the ad hoc fashion in which anisotropy is often introduced into a single-order-parameter continuum theory.

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Citation

Braun, R.J., Cahn, J.W., McFadden, G.B. and Wheeler, A.A. (1997) Anisotropy of interfaces in an ordered alloy: a multiple-order-parameter model Philosophical Transactions: Mathematical, Physical and Engineering Sciences, 355, (1730), pp. 1787-1833.

More information

Published date: 1997
Keywords: antiphase boundaries interphase boundaries phase field multiple order parameter anisotropy surface energy

Identifiers

Local EPrints ID: 391
URI: http://eprints.soton.ac.uk/id/eprint/391
ISSN: 1364-503X
PURE UUID: 9d10d0ae-89cf-42e8-b679-854b965363f3

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Date deposited: 12 Mar 2004
Last modified: 17 Jul 2017 17:17

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Contributors

Author: R.J. Braun
Author: J.W. Cahn
Author: G.B. McFadden
Author: A.A. Wheeler

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