An effect of antiphase boundaries on the kinetics of short-range ordering by a vacancy mechanism

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Abstract
In Monte Carlo simulations of chemical short‐range ordering on a square lattice, the number of single‐atom domains was found to depend on the presence of antiphase boundaries and on the mechanism by which ordering occurred. When antiphase boundaries were present and the ordering occurred by a vacancy mechanism, the number of single‐atom domains was found to increase with decreasing temperature, in contrast to thermodynamic predictions. This is understood as a consequence of highly correlated vacancy motions in those regions of the lattice away from antiphase boundaries.

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