Títol:
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Vacancy-assisted domain-growth in asymmetric binary alloys: A Monte Carlo Study
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Autor/a:
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Porta Tena, Marcel; Vives i Santa-Eulàlia, Eduard; Castán i Vidal, Maria Teresa
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Altres autors:
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Universitat de Barcelona |
Abstract:
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A Monte Carlo simulation study of the vacancy-assisted domain growth in asymmetric binary alloys is presented. The system is modeled using a three-state ABV Hamiltonian which includes an asymmetry term. Our simulated system is a stoichiometric two-dimensional binary alloy with a single vacancy which evolves according to the vacancy-atom exchange mechanism. We obtain that, compared to the symmetric case, the ordering process slows down dramatically. Concerning the asymptotic behavior it is algebraic and characterized by the Allen-Cahn growth exponent x51/2. The late stages of the evolution are preceded by a transient regime strongly affected by both the temperature and the degree of asymmetry of the alloy. The results are discussed and compared to those obtained for the symmetric case. |
Matèries:
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-Aliatges binaris -Termodinàmica estadística -Mètode de Montecarlo -Transformacions de fase (Física estadística) -Binary systems (Metallurgy) -Statistical thermodynamics -Monte Carlo method -Phase transformations (Statistical physics) |
Drets:
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(c) The American Physical Society, 1999
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Tipus de document:
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Article Article - Versió publicada |
Publicat per:
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The American Physical Society
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