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Published March 1, 1988 | Published
Journal Article Open

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

Fultz, B. ORCID icon

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.

Additional Information

© 1988 American Institute of Physics. Received 26 May 1987; accepted 17 November 1987. The assistance of L. Anthony during part of this work is gratefully acknowledged. This work was supported by the U.S. Department of Energy under Contract DE-FG03-86ER45270.

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