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Effective Interactions Approach to Phase Stability in Alloys Under Irradiation

Published online by Cambridge University Press:  10 February 2011

Raúl A. Enrique  and
Pascal Bellon
Raúl A. Enrique
Affiliation:
Univ. of Illinois, Dept. of Materials Science and Engineering, Urbana, IL, 61801, USA.
Pascal Bellon
Affiliation:
Univ. of Illinois, Dept. of Materials Science and Engineering, Urbana, IL, 61801, USA.
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Abstract

Phase stability in alloys under irradiation is studied considering effective thermodynamic potentials. A simple kinetic model of a binary alloy with phase separation is investigated. Time evolution in the alloy results from two competing dynamics: thermal diffusion, and irradiation induced ballistic exchanges. The dynamical (steady state) phase diagram is evaluated exactly performing Kinetic Monte Carlo simulations. The solution is then compared to two theoretical frameworks: the effective quasi-interactions model as proposed by Vaks and Kamishenko, and the effective free energy model as proposed by Martin. New developments of these models are proposed to allow for quantitative comparisons. Both theoretical frameworks yield fairly good approximations to the dynamical phase diagram.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 538: Symposium J – Multiscale Modelling of Materials , 1998 , 229
Copyright
Copyright © Materials Research Society 1999

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