In this paper, we consider the scientific, technical, and technological aspects in the field of creating new high-temperature materials for the parts of the hot section of gas turbine engines (GTEs) with operating temperatures exceeding those existing in GTEs. More refractory metallic materials for the creation of new high-melting alloys used in the manufacture of operating and nozzle blades and other parts of promising gas turbine engines based on the Co-Cr, Pt-Al, Nb-Si, and Mo-Si-B systems were studied. In alloys of the Co-Cr system, the high-temperature strength is mainly provided owing to the hardening of the Co matrix, including dispersed precipitates of the carbide phase (TaC) and the boride phase Cr 2 B. In alloys of the Pt-Al system, it is due to alloying with Cr, Al, Ti, Re, etc., and precipitates of the coherently embedded Pt 3 Al phase. In eutectic alloys of the Nb-Si system, it is due to the complex hardening of the Nb solid solution and the Nb 5 Si 3 silicide, as well as the natural compositional structure. In Mo-Si-B alloys, high strength is achieved by alloying with α-Mo solid solution and the formation of intermetallic phases Mo 3 Si and Mo 5 SiB 2 and carbides Mo 2 C and TiC. We selected compositions; analyzed smelting methods, including directional crystallization that provides a natural compositional structure; evaluated mechanical properties at room and high temperatures and oxidation resistance; studied structural features; and provided information on technological equipment and the possibility of obtaining parts by various methods. It is shown that, depending on the composition of the selected matrix, the operating temperature of heat-resistant alloys can increase to 1300-1500°C, which is significantly higher than the existing operating temperatures for nickel heat-resistant alloys. We conclude that the studied materials are promising for use in aircraft engine manufacture and the aerospace industry.

The scientific, technical and technological aspects in the field of creating new high-temperature materials for the hot tract parts of gas turbine engines (GTE) with operating temperatures exceeding those existing in the GTE are considered. Investigated more refractory metal materials to create new high-temperature alloys used in the manufacture of working and nozzle blades and other parts of promising gas turbine engines based on Co – Cr, Pt – Al, Nb – Si, Mo – Si – B systems. In Co – Cr alloys, heat resistance is mainly ensured by hardening the Co matrix, including dispersed precipitates of the carbide phase (TaC) and the boride phase Cr2B. In alloys of the Pt – Al system, due to the doping of Cr, Al, Ti, Re ... and precipitates of the coherently embedded Pt3Al phase. In eutectic alloys of the Nb-Si system, this is due to complex hardening of the Nb solid solution and Nb5Si3 silicide, as well as the natural compositional structure. In Mo – Si – B alloys, high strength is achieved by doping a-Mo solid solution and the formation of intermetallic phases Mo3Si, Mo5SiB2, carbides Mo2C, TiC. Compositions were selected, analysis of their smelting methods was carried out, including directed crystallization, which provides a natural compositional structure, mechanical properties at room and high temperatures, oxidation resistance were evaluated, structural features were investigated, information was provided on technological equipment and the possibility of obtaining parts in various ways. It is shown that, depending on the composition of the selected matrix, the working temperature of heat-resistant alloys can increase to 1300 – 1500 °C, which significantly exceeds the existing nickel heat-resistant alloys. It is concluded that the materials under study are promising for use in aircraft engine building and the aerospace industry.