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Article

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1999

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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/10476

Vacancy-assisted domain-growth in asymmetric binary alloys: A Monte Carlo Study

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http://dx.doi.org/10.1103/PhysRevB.60.3920

Abstract

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.

Subject

Aliatges binaris, Termodinàmica estadística, Mètode de Montecarlo, Transformacions de fase (Física estadística)

Subject (English)

Binary systems (Metallurgy), Statistical thermodynamics, Monte Carlo method, Phase transformations (Statistical physics)

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Articles publicats en revistes (Física Quàntica i Astrofísica)

Citation

PORTA TENA, Marcel, VIVES I SANTA-EULÀLIA, Eduard and CASTÁN I VIDAL, Maria Teresa. Vacancy-assisted domain-growth in asymmetric binary alloys: A Monte Carlo Study. Physical Review B. 1999. Vol. 60, num. 6, pags. 3920-3927. ISSN 0163-1829. [consulted: 18 of August of 2026]. Available at: https://hdl.handle.net/2445/10476

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