Synthesis and properties of carbon-carbon composite material based on nanoporous carbon

Effect of synthesis parameters of carbon-carbon nanoporous composites in the form of compact bodies with various geometric shapes on their structure and properties was studied. The synthesis process includes three technological stages: molding of blanks with prescribed size and shape powdered Ti, Si, B, Mo, etc. carbides, their thermal treatment with methane to give a carbide-pyrocarbon composite, thermochemical treatment of the composite with chlorine to give the final material, carbon-carbon nanoporous composite in which nanoporous carbon is a filler, and pyrocarbon, a binder. It is shown that the ratio between the carbide phases and pyrocarbon, compaction pressure, and temperature of chlorination of the chemical composition of carbide affect the properties of the composite. The carbon-carbon composites synthesized contain nanopores 0.7-3 nm in size and micropores and have a large specific surface area (up to 1000 m(2) g(-1)). The volume of the nanopores in the composites varies within the range 0.42-0.79 cm(3) g(-1).