Title:
|
Vacancy-assisted domain-growth in asymmetric binary alloys: A Monte Carlo Study
|
Author:
|
Porta Tena, Marcel; Vives i Santa-Eulàlia, Eduard; Castán i Vidal, Maria Teresa
|
Other authors:
|
Universitat de Barcelona |
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(s):
|
-Aliatges binaris -Termodinàmica estadística -Mètode de Montecarlo -Transformacions de fase (Física estadística) -Binary systems (Metallurgy) -Statistical thermodynamics -Monte Carlo method -Phase transformations (Statistical physics) |
Rights:
|
(c) The American Physical Society, 1999
|
Document type:
|
Article Article - Published version |
Published by:
|
The American Physical Society
|
Share:
|
|