High Strength, High Toughness In Situ Ceramic Composites

摘要

The thermal analysis, both differential thermal analysis (DTA) andthermalgravimetric analysis (TGA), of the 3TiC+2Si (composition 32) and 3TiC+3Si (composition 33) compositions showed that solid state displacement reactions start above 1000 deg C in TiC-Si system. A series of pressureless sintering experiments were carried out to determine the extent of reaction in 32 and 33 compositions at 1000 deg C, 1300 deg C, and 1500 deg C under argon gas atmosphere. Small 0.5 inches diameter pellet shaped samples were sintered for two hours at the predetermined temperatures. The sintered samples were analyzed by X-ray diffraction. (MM).