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. Copper-phosphorous 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 two-layer galvanic coating consisting of inner copper and outer nickel layer.

EFFECT: higher quality of composite material.

1 cl, 2 dwg, 1 tbl, 1 ex