抄録
Mechanical properties of two kinds of 3-D woven SiC_f/SiC composite materials (CMCs) were investigated at elevated temperatures up to 1400℃. One is the CMC using a preform with carbon coating( Type A), and the other is that using a preform with SiC coating (Type B). Type B CMC indicated higher tensile strength and rigidity than Type A one at room temperature. Tensile strengths and Young's modulus of both CMC materials decreased with increasing temperature. At temperatures beyond 1200℃, the tensile strengths of both CMCs are almost same values regardless of the fiber/matrix interface coating.
