HIGH-TEMPERATURE LAYERED-FIBER COMPOSITE REINFORCED WITH OXIDE FIBERS, AND METHOD FOR ITS PRODUCTION Russian patent published in 2021 - IPC C22C49/02 C22C49/12 

FIELD: composite materials.

SUBSTANCE: invention relates to high-temperature structural composite materials with a metal matrix and methods for their production. A high-temperature layered-fiber composite, with a matrix based on Nb, solid solution of Nb(Al), as well as intermetallides Nb²Al and Nb³Al, contains layers of Mo, solid solution of Mo(Al) and intermetallic Mo3Al, reinforced with fibers of single-crystal sapphire and/or yttrium-aluminum garnet, mullite, or fibers of eutectic compounds based on aluminum oxide and rare earth metal oxides, which are located unidirectionally within one layer and in the entire volume of the composite, or the direction of laying the fibers varies from layer to layer. The method for producing this composite consists in assembling elements in which oxide fibers are placed between two aluminum foils, the gaps between the fibers are filled with a suspension of Nb powder in polyethylene glycol, laying the elements with layers of molybdenum foil and compacting them by diffusion welding under vacuum conditions at a pressure of 10 MPa and a temperature of 1630°C for 0.5 hours.

EFFECT: invention provides decreased specific gravity, increased operating temperature, crack resistance, strength, stiffness and creep resistance of a high-temperature composite material, in reducing the duration of the process of its production.

2 cl, 6 dwg, 1 ex