Abstract: In a process for manufacturing a carbon-carbon component, in particular a brake disk, a porous substrate in the shape of a brake disk (32) is formed exclusively from carbon fibres. Holes (34), whose axes are parallel to the axis of rotation (36) of the disk, are made in the substrate and are arranged on concentric circles (38) centered on said axis of rotation. Areas (42) free of holes are provided around keyways (40) in the disk. The substrate is then compregnated by CVD. The holes in the substrate reduce the path of the gas in the substrate.

Abstract: A process for manufacturing porous tubes made from carbon-carbon composite material by winding over a mandrel a non-woven sheet, made from a carbon fiber precursor, followed by compression and hot stabilisation of the assembly, with impregnation of the compressed sheet by a resin, followed by a thermal carbonisation treatment of the resin. Tubes are obtained having high permeability, small pore diameter and an inner surface of low rugosity. The tubes produced ar particularly suitable for the manufacture of filtration elements and of filtering membrane supports.