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The Role of the Diffusion Mechanism in Models of the Evolution of Microstructure During Phase Separation

Published online by Cambridge University Press:  10 February 2011

T.T. Rautialnen  and
A.P. Sutton
T.T. Rautialnen
Affiliation:
Department of Materials, University of Oxford, Parks Road, Oxford OX 1 3PH, U.K.
A.P. Sutton
Affiliation:
Department of Materials, University of Oxford, Parks Road, Oxford OX 1 3PH, U.K.
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Abstract

We have studied phase separation and subsequent coarsening of the microstructure in a two-dimensional square lattice using a stochastic Monte Carlo model and a deterministic mean field model. The differences and similarities between these approaches are discussed. We have found that a realistic diffusion mechanism through a vacancy motion in Monte Carlo simulations is cruicial in producing different coarsening mechanisms over a range of temperatures. This cannot be captured by the mean field model, in which the transformation is governed by the minimization of a free energy functional.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 529: Symposia BB – Computational & Mathematical Models of Microstructural Evolution , 1998 , 65
Copyright
Copyright © Materials Research Society 1998

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