【摘要】 以α－SiC粉末为起始原料，B和C粉末为助烧剂，采用适当的热压烧结工艺，在1950℃，25MPa条件下获得了相对密度为97.8％的α－SiC块体陶瓷．其抗弯强度和断裂韧性值分别为383MPa，4.95MPa·m1／2．并初步研究了致密化机理．更多还原

【Abstract】 α-SiC ceramic was obtained by hot-pressing of α-SiC powders with B and C as additives. The relative density of the materials is 97.8%, which was hot-pressed at 1900℃ and 25 MPa. The values of the flexural strength and fracture toughness reached 383 MPa and 4.95 MPa·m1/2 respectively.The densification mechanism was deduced.更多还原