Porta Tena, MarcelVives i Santa-Eulàlia, EduardCastán i Vidal, Maria Teresa2009-12-242009-12-2419990163-1829https://hdl.handle.net/2445/10476A 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.8 p.application/pdfeng(c) The American Physical Society, 1999Aliatges binarisTermodinàmica estadísticaMètode de MontecarloTransformacions de fase (Física estadística)Binary systems (Metallurgy)Statistical thermodynamicsMonte Carlo methodPhase transformations (Statistical physics)info:eu-repo/semantics/article148002info:eu-repo/semantics/openAccess