Mechanical properties of carbon fibre-reinforced hBN matrix composites at elevated temperature

摘要

Dense carbon fiber-reinforced hBN composites were fabricated using reactive sintering aids, Si{sub}3N{sub}4, SiO{sub}2 and Y{sub}2O{sub}3 by filament winding method followed by hot pressing in N{sub}2 flow, The most suitable temperature forfabrication was found to be 1800°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°C reached double of the one at room temperature.