Kharchenko V. Microstructure transformations and self-organization processes in condensed matter

In the dissertation the theoretical scheme to describe the evolution of defect structure and microstructural transformations in the volume of irradiated materials and the effects of surface structuring in the processes of ion sputtering and condensation by using the methods of multiscale modeling is developed. The structural and energeticy properties of zirconium with vacancies and zirconium-niobium alloys are established. An influence of defect production rate, temperature of irradiation and thermal fluctuations on processes of radiation-stimulated clustering of nonequilibrium vacancies, morphology of point defect structures, growth processes of grains and pores was revealed. An influence of irradiation on the processes of radiation-stimulated vacancy segregation during phase decomposition of binary alloys is established. An influence of the irradiation-induced athermal mixing on the defect structure of the irradiated crystalline system after annealing is determined. The conditions of type and orientation of surface structures control at ion-beam sputtering by taking into account fluctuations in incidence angle revealed. The mechanisms of morphology of the growing surface and the sizes of the surface nanosized adsorbate structures control at condensation from the gas phase, in systems of plasma-condensate and in epitaxial growth are established.