Abstract
SiC/SiC composites containing 30vol.% with non-coated Tyranno SA short fibers were fabricated by tape-casting and hot-pressing at 1750°C under a pressure of 40 MPa using an Al203-Y203-CaO system as sintering additives. Fibers were mostly aligned parallel to the sheet plane of green sheets. The composite fabricated by this process achieved nearly full density after hot-pressing at 1750°C. The SiC/SiC composites showed completely brittle fracture at room and high temperatures. The reason for the brittle fracture of the composites could be mainly explained by the degradation of fiber and strength of fiber/matrix interfacial bonding.
