METHOD FOR PRODUCTION OF CARBON-GRAPHITE COMPOSITE MATERIAL Russian patent published in 2023 - IPC C22C47/12 B22F3/26 

FIELD: metallurgy.

SUBSTANCE: method for the production of carbon-graphite composite material includes vacuum degasification of a porous workpiece in an oversaturated aqueous solution of copper sulfate with a concentration of 650 g/l, at a temperature of a salt solution of 80°C. After vacuum degasification, the workpiece is dried at 150°C to constant weight of the workpiece. Carbon-graphite pores are sealed by means of dipping of the workpiece preheated to 400-450°C into an aluminum alloy consisting of 18-22 wt.% of zinc, 16-20 wt.% of magnesium, 3.5-4.5 wt.% of copper, aluminum is the rest, with subsequent cooling of the workpiece in air. The workpiece is impregnated with a melt of a matrix aluminum alloy of the same composition under excessive pressure due to thermal expansion of the melt of the aluminum alloy, when heated by 300°C higher than a temperature of aluminum alloy recrystallization. The workpiece is sealed with a lead alloy in a mold, at a temperature of 600°C.

EFFECT: increase in the quality of composite material.

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