Search academic texts

Information × Registration Number 0206U009140, 0101U006529 , R & D reports Title Formation of metallic system with the laser-induced periodic surfas nanostructures popup.stage_title Head Sidorenko Sergey Ivanovich, Доктор фізико-математичних наук Registration Date 25-12-2006 Organization National Technical University of Ukraine "KPI", Physical-ingenering faculty popup.description2 It is shown, that the thermal treatment laser treatment has character high extreme effects - "thermal heat", that at particular treatment conditions (Е Еп) provide transfer of a material microvolumes in a fluid state, development of the accelerated mass transfer in a system "liquid phase-solid phase", hardening. At such treatment the nonuniform structural and concentration distributions, thermodynamically nonequilibrium, but kinetically resistant states are formed. It is established, that the special role in diffusion mass transfer of copper and chromium atoms at high-heat treatment by laser irradiation of thin-film Cr/Cu/Ni system is played with an external surface of a nickel layer. The surface thermodynamically causes directional components mass transfer in volume of a thin-film system. It is drain region for diffusing elements - copper and chromium at that the control factor is chromium oxide formation on external surface of nickel layer. The concentration gradients of diffusing elements during a high-heat treatment by laser irradiation are kept (concentration homogeneity in volume of a thin-film system not attained). The effect of a high-heat treatment by laser irradiation on structure formation of thin-film Cr/Cu/Ni system surface is shown. Product Description popup.authors popup.nrat_date 2020-04-02 Close