MECHANISMS OF THE FORMATION OF ORDERED DE FECT STRUCTURES BY THE ACTION OF CONCENTRATED ENERGY FLUXES

A general kinetic model is proposed for the development of concentrati on-deformation-thermal instabilities in a system of point defects (vac ancies, interstitials, impurities) in crystals subjected to concentrat ed energy fluxes. This model was used in an analysis of the formation of periodic ring vacancy structures and the appearance of flexural def ormation in a film on a substrate. The period of the resultant structu re, as well as the dependences of this period on the conditions during irradiation and on the film parameters, are found. The theoretical re sults are show to agree satisfactorily with experiments on laser depos ition of molybdenum films on an insulator substrate.