抄録
Influence of volume content of carbon fibers (Vf) and elastic modulus of carbon fibers (Ef) on the mechanical properties of Cf/SiC composite was discussed. Fracture toughness and flexural strength of Cf/SiC composites increased with increasing Vf in the range from 40 to 60%. On the other hand, fracture toughness and flexural strength of Cf/SiC composite increased with increasing in the range from 440 to 540 GPa but decreased with Ef in the range between 540 and 640 GPa. The highest flexural strength (1050 MPa at 1450°C) and fracture toughness (25 MPa √m) were obtained by the Cf/SiC composite made of the carbon fiber whose Ef was 540 GPa.
