高能球磨结合无压烧结制备TiB_2-TiC复相陶瓷  

Fabrication of TiB_2-TiC Multiphase Ceramics via High Energy Ball Milling and Subsequent Pressureless Sintering

作　　者：王慧华[1,2] 孙树臣[2] 王德永[2] 朱小平[2] 涂赣峰[2] 

机构地区：[1]沈阳化工大学材料科学与工程学院,沈阳110142 [2]东北大学材料与冶金学院,沈阳110189

出　　处：《材料研究学报》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~~

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.

关 键 词：无机非金属材料 TiB2-TiC复相陶瓷 机械合金化 力学性能 连续界面 

分 类 号：TB321[一般工业技术—材料科学与工程]