无压及热压烧结法制备Ce-TZP/Al_2O_3复相陶瓷材料  

Pressureless and hot-pressing sintering of Ce-TZP/Al_2O_3 composite ceramics

作　　者：杨刚[1] 黎俊初[1] 罗军明[1] 闵嗣林[1] 陈同彩[1] 

机构地区：[1]南昌航空工业学院材料科学与工程系,江西南昌330034

出　　处：《兵器材料科学与工程》2004年第3期40-43,共4页Ordnance Material Science and Engineering

基　　金：南昌航空工业学院航空自选课题(EC200101003)资助;江西省教育厅科技项目(DB200201009)资助;江西省材料科学与工程中心基金(KG200201020)

摘　　要：研究了无压和热压烧结Ce-CP/Al_2O_3陶瓷材料组织和性能。结果表明,热压烧结时,材料在1400℃,保温1h的条件下达到充分致密,此时相对密度为98.6％,这一结果与热压过程中的外加压力大大促进材料的致密化有关;而无压烧结时,材料达到充分致密化的温度为1500℃,相对密度为97.5％。另外,同无压烧结的样品相比,热压样品的微观组织细小,综合力学性能优良。The microstructures and mechanical properties of Ce - TZP/Al_2O_3 ceramics prepared by pressureless and hot - pressing sintering were investigated. It was shown that, the hot - pressed samples with a relative density of 98.6% reached full densification at sintering temperature of 1400℃, holding time of 1h and pressure of 20MPa, this result was attributed to the external pressure promoting and accelerating the process of densification, whereas the pressureless - sintered samples with a relative density of 97.5% were fully densified at 1500℃, additionally, the mechanical properties of the hot - pressed samples with fine grains were better than that of pressureless samples.

关 键 词：陶瓷 充分致密 无压烧结 热压烧结 

分 类 号：TQ174.6[化学工程—陶瓷工业] TB332[化学工程—硅酸盐工业]