METHOD FOR PRODUCING HEAT-CONDUCTING COMPOSITE MATERIAL FROM POWDERS OF ALUMINIUM OR ALLOY THEREOF WITH GRAPHENE COATING Russian patent published in 2021 - IPC B22F1/02 B22F3/14 B22F9/02 C23C18/12 C22C1/04 C22C1/10 B82Y30/00 

FIELD: composite materials.

SUBSTANCE: invention relates to a method for producing a composite material from a powder of aluminium or an alloy thereof. The powder of aluminium or the alloy thereof and a liquid carbon-containing substance are mixed while heated to the temperature of decomposition of said carbon-containing substance, constituting 60 to 150°C and ensuring release of carbon and deposition thereof in the form of a graphene coating on said powder. The liquid carbon-containing substance is selected from the group: an acid or an aqueous solution thereof, a water-soluble salt or an aqueous solution thereof, a chemical compound containing cations of carbon constituting carbon tetrachloride (CCl₄) or ethylbenzene (C₈H₁₀). Carbonic acid, acetic acid, formic acid, or an aqueous solution of one of these acids is used as an acid or an aqueous solution thereof. A salt of carbonic (H₂CO₃), acetic (CH₃COOH), formic (CH₂O₂) acid or an aqueous solution of one of the specified salts is used as a water-soluble salt or an aqueous solution thereof. The graphene-coated powder is compacted and sintered at a pressure of 800 to 1000 MPa and at a temperature of 350 to 500°C.

EFFECT: dense durable composite material with a continuous graphene grid providing said material with high heat conductivity is produced.

1 cl, 3 ex