Mechanisms of the vacancy defect migration in a two-dimensional ordered Ni3Al alloy near the antiphase boundary were studied using the molecular-dynamics method. The kinetics of the phase transformations depended strongly on the local atomic configurations which in many respects determined the mechanisms of the vacancy-defect migration. Interactions of vacancy complexes with antiphase boundaries played an important role during the alloy disordering. Segregation of vacancy complexes at an antiphase boundary led to the formation of complex low-dimensional defects in an ordered alloy.

Study of Mechanisms of Vacancy Defect Migration in Two-Dimensional Ordered Ni3Al Alloy. Dudnik, E.A.: Bulletin of the Russian Academy of Sciences – Physics, 2006, 69[7], 1093-6