原料B_4C粉末粒度对多孔TiB_2-TiC复相陶瓷孔结构的影响  

Effect of particle size of B_4C on pore structure of porous TiB_2-TiC multiphase ceramics

作　　者：韩超[1] 曹顺华[1] 刘慧远[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,长沙410083

出　　处：《粉末冶金材料科学与工程》2011年第5期678-681,共4页Materials Science and Engineering of Powder Metallurgy

基　　金：湖南省自然科学基金资助项目(11JJ4036)

摘　　要：为了获得总孔隙度为(30±5)%的TiB2-TiC复相陶瓷,采用不同粒度的B4C与Ti粉为原料,通过反应烧结制备TiB2-TiC多孔复合材料。研究原料B4C粒度对样品的密度及孔结构性能的影响。实验结果表明:随着原料B4C粉末粒度的减小,样品的密度逐渐增大,总孔隙率和开孔隙率逐步减小;当采用中位径为2.62μm的B4C粉末为原料时,所制备的多孔TiB2-TiC复合材料密度为3.1 g/cm3,总孔隙率为35%,其中开孔隙率为29%,所得多孔TiB2-TiC复相陶瓷具有孔隙细小且分布均匀的孔结构特征。In order to obtain porous TiB2-TiC multiphase ceramics whose total porosity is（30±5） %,reaction sintering was carried out by different particle size of B4C to study the effect of particle size of B4C on the density and pore structure.The result indicates that,with the decrease of the particle size,the density increases all the while,total porosity and open porosity decrease gradually.The porous TiB2-TiC multiphase ceramics were prepared by B4C with median diameter of 2.62 μm and its density,total porosity and open porosity are 3.1 g/cm3,35%,29%,respectively.Modified porous TiB2-TiC multiphase ceramics have well distributed pore structure.

关 键 词：TiB2-TiC复相陶瓷 反应烧结 孔隙率 

分 类 号：TF125.6[冶金工程—粉末冶金]