Hrekova M. Structure and properties of modified heat-resistant nickel alloys for parts of rocket and jet engines

The dissertation work is devoted to material science issues of stabilization of structure and increase of complex of physical and mechanical properties of heat - resistant nickel alloys for details of rocket and jet engines. The purpose of the work is to increase the physico-mechanical and corrosion properties of heat-resistant nickel alloys for parts of rocket and jet engines based on the rules of structure formulation as a result of modified nanodisperse compounds. The analysis of modern directions of increase of properties of heat-resistant nickel alloys, their chemical compositions, structural stability and phase composition, modes of heat treatment is carried out, the classification of nickel alloys of I, II, III, IV generation is resulted. Despite the large number of scientific papers on various aspects of materials and modern technologies for the manufacture of aerospace parts, there is a problem of improving the physical and mechanical properties of the railway. This is because the parts of rocket and aircraft engines during operation are exposed to aggressive fuels at elevated temperatures. The best way to improve the quality of alloys is to modify the refractory compounds. Also considered are methods for producing nanodispersed compositions. Of the existing methods, of interest is plasma chemical synthesis, which allows obtaining nanodispersed powders with a given composition and fractions of various metals and compounds. Improving the quality of alloys by modifying nanomaterials remains not fully understood, although the available developments and previous studies of other scientists indicate the extreme prospects of the method. Thus, research on the development of heat-resistant nickel alloys at a qualitatively new level by modifying nanodispersed materials is of great importance.