CHEMICAL-VAPOR-DEPOSITION OF SILICON-CARBIDE ON HOLLOW AND C-SHAPED CARBON-FIBERS

The thermally induced chemical vapour deposition of silicon carbide fr om methyltrichlorosilane (MTS) on isotropic pitch based carbon fibres with hollow and C-shaped cross sections was investigated. The uncoated and coated fibres were characterized by their mechanical properties ( tensile strength, Young's modulus and torsional rigidity modulus) and surface energetic analysis. The oxidation behaviour of the carbon fibr es before and after coating was discussed in terms of the weight chang e measured in a thermal balance during heating in an air flow at a con stant heating rate.