Mechanical Properties of Carbon Fiber-Reinforced hBN Matrix Composites at Elevated Temperature

摘要

Dense carbon fiber-reinforced hBN composites were fabricaled using reactive sintering aids, Si3N4,SiO2 and Y2O3. by filament winding method followed by hot pressing in N2 flow. The most suitable temperature for fabrication was found to be 1800 deg C. The bending strength of the composites at room and elevated temperatures showed excellent properties, namely, it increased enormously as test temperature increased. The strength at 1600 deg C reached double of the one at room temperature.