壳核式Al_2O_3-Y_2O_3/ZrB_2复合粉体的放电等离子烧结行为研究  

Spark Plasma Sintering Behavior of Shell-core Al_2O_3-Y_2O_3 /ZrB_2 Composite Powders

作　　者：宋杰光[1,2] 杜大明[1] 鞠银燕[1] 徐明晗[1] 李养良[1,2] 李世斌[1,2] 纪岗昌[2] 张联盟[3] 

机构地区：[1]九江学院机械与材料工程学院,九江332005 [2]九江学院九江市绿色再制造重点实验室,九江332005 [3]武汉理工大学材料复合新技术国家重点试验室,武汉430070

出　　处：《硅酸盐通报》2010年第3期592-596,共5页Bulletin of the Chinese Ceramic Society

基　　金：国家973计划子项目(No.51331);江西省教育厅青年科学基金项目(No.GJJ09595)

摘　　要：ZrB2具有优良的物理特性和化学稳定性而应用于许多领域,但是ZrB2难以烧结致密和在高温条件下容易被氧化。为了充分发挥ZrB2的优点,改善ZrB2的缺点,本文采用共沉淀法制备壳核式Al2O3-Y2O3/ZrB2复合粉体,通过放电等离子烧结法制备高致密的ZrB2-YAG陶瓷。在相同实验条件下得到的纯ZrB2陶瓷的相对密度都很低,在85%以下。通过此种方法加入少量YAG后,烧结密度得到明显提高,随YAG添加量的增加相对密度增加。添加量超过30wt%后,可以达到几乎完全致密的ZrB2-YAG陶瓷。ZrB2 has some excellent physical performance and chemical stability,it has been applied widely,but sintering of ZrB2 is difficult to be densified and easy oxidation at high temperature.To keep advantages and improve disadvantages of ZrB2,in this paper,the shell-core structure Al2O3-Y2O3/ZrB2 composite powders are prepared by the co-precipitation methods,the high density ZrB2-YAG ceramics is prepared by the spark plasma sintering（SPS）.The low relative density for 85% and pure ZrB2 ceramics were prepared under the same conditions,the sintering relative density of ZrB2 ceramics is obviously increased through the this paper method,which is increased with the increasing YAG content.When YAG is higher than 30wt%,ZrB2-YAG ceramics is almost completely dense.

关 键 词：ZRB2 YAG 壳-核结构 共沉淀法 放电等离子烧结 

分 类 号：TF12[冶金工程—粉末冶金]