摘要
以用高能球磨方法制备的陶瓷粉体为原料,采用无压烧结技术制备了致密的TiB2-TiC复相陶瓷。结果表明,机械合金化过程对于控制TiB2-TiC复相陶瓷的显微结构和相组成有重要的影响,而且能促进TiB2和TiC两相间连续界面的形成;球磨48 h的粉体在1800℃烧结2 h后,可制备出相对密度为98.4%、抗弯强度为487 MPa、硬度值(HRA)为94.7、断裂韧性为5.83 MPa·m1/2的TiB2-TiC复相陶瓷。
Dense TiB2-TiC multiphase ceramics were prepared by pressureless sintering technique, starting as the powder mixtures obtained by high energy ball milling. The results show that the mechanical alloying was beneficial not only for the control of the microstructures and phase component of the TiB2-TiC composites, but also for the formation of coherent interface between TiB2 and TiC. The TiB2-TiC composites sintered using the 48 h milled powder at 1800℃ for 2 h have the optimum values of mechanical properties, such as densities greater than 98% of the theoretical value, higher bending strength （487 MPa）, higher hardness （94.7, HRA）, and fracture toughness （5.83 MPa·m^1/2.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2013年第5期489-494,共6页
Chinese Journal of Materials Research
基金
国家高技术研究发展计划项目2011AA03A409
沈阳市科技计划项目F13-316-1-6资助~~
