Abstract
The formation of Si-C-N interfacial coating (IC) on carbon fibers (CF) from polycarbosilane, oligovinylsilazane and rolivsan was studied. The DSC, thermogravimetry, infrared spectroscopy, contact angle measurements, SEM and EDS were used to study curing and pyrolysis of preceramic compositions (PCs) and to control the processing parameters of infiltration process. The thermokinetic calculations were used to choose the optimal time-temperature conditions of curing and pyrolysis of PCs. The curing and pyrolysis under appropriate conditions makes it possible to obtain the uniform ICs, which increase the thermal oxidative stability of CF. The combustion products of CF with ceramic coating are hollow SiO2 structures with nanometer wall thickness
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