Abstract
The mechanical properties of high thermal conductive SiC ceramics were studied. The bending strength was 430MPa at room temperature and raised to 720MPa at 1400°C, but it decreased to 630MPa at 1500°C. The fracture toughness was 3.8MPa·m1/2 at room temperature and increased with increasing temperature, while Young's modulus was 460GPa at room temperature and decreased above 1300°C
