Void motion in nonuniform temperature and stress fields: a microscopic theory

Void motion under effect of an arbitrary nonuniform field is considered under the assumptions of the microscopic diffusion theory. The diffusion motion of particles over an arbitrary curvilinear surface under effect of this field has been considered separately. A general formula for void movement velocity has been obtained with allowance for the distortions of the vacancy and adatom jump probabilities as they move from one lattice point to another under a nonuniform field. The results are applied to a determination of void movement velocity in a temperature or elastic stress gradient. (author)