Investigations on gas-phase densification of CCFs, obtained on iron, using the radially driven pyrolysis zone and, at the same time, the temperature rise in the pyrolysis zone with the speed of the 1.25 °С/h, were carried out. CCFs, bonded with pyrocarbon (CCFBPyC), not refined from iron, without defects, with density and PyC content corresponding to the material: graphite bonded with pyrocarbon (GBPyC), which include 90 wt.% of PyC (GBPyC90), were obtained. The necessity of applying the special technological methods in the process of gas-phase densification of CCFs, was confirmed.

Investigations on gas-phase densification of the catalytic carbon formations (CCFs), obtained on nickel, using the method of radially driven pyrolysis zone were carried out. Straight dependence of the brittle strength of the CCFs, bonded with pyrocarbon (CCFBPyC), from the CCFs morphology, was shown. It was determined, that the result of decreasing of an amount of fibrous, fine-grained CCFs component is the increasing of strength of the pyrocarbon matrix . For the first time, carbon/carbon composite materials (CCCM ) without cracks, which contain refined or not-refined from nickel, carbon nanomaterials (CNM), were obtained.