纳米SiC和添加剂ZrO_2对Al_2O_3基纳米复合陶瓷显微组织和性能的影响  

Influence of nano SiC and sintering additive ZrO_2 on microstructureand performance of Al_2O_3 based nano composites

作　　者：晏建武[1] 鲁世强[2] 周继承[1] 张志华[2] 李卫超[2] 

机构地区：[1]中南大学物理科学与技术学院,长沙410083 [2]南昌航空工业学院材料科学与工程系,南昌330034

出　　处：《中国有色金属学报》2004年第6期1007-1012,共6页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(60171043);航空高校自选课题资助项目(EC200101002)

摘　　要：采用极性分散剂,在微米Al2O3基体中加入微米ZrO2和纳米SiC颗粒,用真空热压法制备出了Al2O3/SiC纳米复合陶瓷,并研究了微米ZrO2和纳米SiC的添加对Al2O3/SiC纳米复合陶瓷显微组织及其性能的影响。结果表明:与纯Al2O3比较,适量微米ZrO2和纳米SiC颗粒的加入阻碍了Al2O3晶粒的长大,使复合陶瓷的显微组织非常细小,纳米复合陶瓷烧结后的力学性能大大提高。The micron particle Al_2O_3 based nanocomposite ceramics reinforced with micro ZrO_2 and nano SiC particle were prepared by polarity dispersant and vacuum-sintering technology, and the influences of micro ZrO_2 and nano SiC on sintering technology were investigated. The results show that the proper quantity of micro ZrO_2 and nano SiC particle prohibit Al_2O_3 grain growth excessly and the microstructures are fine comparing with the pure Al_2O_3 matrix ceramic and the mechanical properties of Al_2O_3/SiC nanocomposite ceramics are enhanced greatly.

关 键 词：Al2O3/SiC纳米复合陶瓷 显微组织 力学性能 

分 类 号：TB332[一般工业技术—材料科学与工程]