HIGH-TEMPERATURE COMPOSITES WITH A MOLYBDENUM MATRIX AND A METHOD FOR PRODUCTION THEREOF Russian patent published in 2020 - IPC C22C49/10 

FIELD: technological processes.

SUBSTANCE: invention relates to high-temperature composite materials with a metal matrix and methods for production thereof and can be used to produce blades of aircraft gas turbine engines operating at temperatures of up to 1,400 °C. High-temperature composite with molybdenum matrix and oxide fibers is characterized by that molybdenum matrix contains reinforcing particles Mo₃Si and Mo₅SiB₂. Method of producing high-temperature composite with molybdenum matrix and oxide fibers involves formation of diffusion-welded frame with alternating layers of molybdenum foil and layers of molybdenum wire, impregnation of obtained carcass by molten oxides, subsequent cooling and crystallization of molten oxides in carcass channels. When forming the frame, a slurry containing silicon and boron is added to each layer of molybdenum foil, the formed frame is thermally treated at temperature of 2,000 °C to form Mo₃Si and Mo₅SiB₂ reinforcing particles, followed by diffusion welding of the frame.

EFFECT: material is characterized by high values of crack resistance and high-temperature strength.

4 cl, 4 dwg, 4 tbl, 1 ex