METHOD FOR INCREASING PERMEABILITY OF PORES OF A CARBON-GRAPHITE WORKPIECE Russian patent published in 2019 - IPC B22F3/26 C22C1/08 B60L5/00 

FIELD: technological processes.

SUBSTANCE: invention relates to production of carbon-graphite composite material. Method includes vacuum degassing of porous carbon-graphite workpiece, its impregnation in impregnation chamber by molten matrix alloy under effect of excessive pressure due to thermal expansion of lead melt in pressure chamber at heating by 100 °C above the liquidus temperature of the matrix alloy simultaneously with lead melt. Antimony alloy is used as matrix alloy, degassing is performed before immersion of porous workpiece into melt of matrix alloy, and before impregnation porous workpiece is coated with three-layer galvanic coating consisting of inner copper, medium nickel and outer chromium layers.

EFFECT: higher quality of composite material.

1 cl, 2 dwg, 1 tbl, 1 ex