SiC的固相热压烧结

Solid State Hot Pressing of SiC Ceramics

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·m^1/2.并初步研究了致密化机理.

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·m^1/2 respectively.The densification mechanism was deduced.