硅酸盐学报2007，Vol.35Issue(8)：973-977,5.
气压烧结TiB2-Al2O3复相陶瓷的显微结构与力学性能
MICROSTRUCTURE AND MECHANICAL PROPERTIES OF GAS PRESSURE SINTERING TiB2-Al2O3 MULTIPHASE CERAMICS
摘要
Abstract
TiB2-Al2O3 multiphase ceramics, containing 20%, 30% and 50% (mass fraction, the same below) Al2O3, were fabricated by the gas pressure sintering method, using 2.5% Ni as an assistant. The microstructure of the samples was observed by scanning electron microscopy, and the effects of the Al2O3 content on the microstructural and mechanical properties were investigated. The results show that the densification is effectively accelerated by adding Ni. With the increase of the Al2O3 content, the density of the ceramic,the bending strength and the fractural toughness are all enhanced; the Young's modulus appears with a peak value, the Vickers hardness decreases, and the Rockwell hardness has little change. The TiB2-Al2O3 ceramic with 30% Al2O3 shows more promising properties, with a bending strength of 520 MPa, a Young's modulus of 339 GPa, and a Rockwell hardness of 92.6.关键词
二硼化钛-氧化铝/复相陶瓷/气压烧结/力学性能Key words
titanium diboride-alumina/multiphase ceramics/gas pressure sintering/mechanical properties分类
通用工业技术引用本文复制引用
李家镜,傅正义,张金咏,王为民,王皓,王玉成,张清杰..气压烧结TiB2-Al2O3复相陶瓷的显微结构与力学性能[J].硅酸盐学报,2007,35(8):973-977,5.基金项目
教育部(104251,PCSIRT)和湖北省新技术发展基金(2006ABC006)资助项目. （104251,PCSIRT）
