Grechanyuk I. Scientific and technological principles of creating new composite materials based on nickel, cobalt, titanium and copper and the latest electron-beam equipment for their production

The dissertation on competition of a scientific degree of the doctor of technical sciences on a specialty 05.02.01 – materials science (13 Mechanical engineering). Institute of Problems of Materials Science named after I.N. Frantsevich NAS of Ukraine, Kyiv, 2021. In this work has been comprehensively solved the scientific and technological problem of creation and improvement of new materials and electron-beam equipment for their production. The structure, chemical, phase composition also physical and mechanical properties have been investigated and receiving technologies have been developed: alloys and powders from the material based on Ni(Co)CrAlY(Sі) for protective coatings application; tubular cathodes made of NiCrAlY alloys for applying heat-resistant ion-plasma coatings on MAП devices; conditional ingots of heat-resistant ЖС26-ВИ alloys, obtained from their wastes, what made it possible to save up to 20% of raw materials during their production; medical grade TiZrNbSi alloys that are not toxic to the human body; ligatures of various compositions: Ni-Y, Hf-Ni, Al-Mo, V-Al, Zr-Ti, Nb-Ti, the impurities concentration in which is almost two times lower compared to similar alloys obtained by other methods; high-purity Fe-Al, Fe-Co-Al-Ti-Cu, Ni-W alloys for monocrystalline blades growth; vapor-condensed (Cu-C-Zr-Y-Nb)-Mo-CuO-MoO3 composite materials for discontinuous and (Cu-Cr-Zr-Y-Nb)-Mo-CuO-MoO3 sliding contacts. The dependence of the mechanical properties of pseudoalloys based on copper and molybdenum, additionally alloyed with chromium and carbon, on the molybdenum content has been established. Industrial batches of CoCrAlY, TiZrYSi alloys, CoCrAlYSi powders, ligatures of various types are supplying to Ukraine, China and USA. With the author participation, to obtain the materials indicated in this work, design documentation has been developed and pilot samples of industrial installations have been created: for metals and alloys L-4 melting; coating L-8; universal laboratory L-2; industrial L-8.3. Manufactured units have been delivered to enterprises in Ukraine, China, Armenia and England.