ZrO_2-Al_2O_3复相陶瓷的研究  

Study on the ZrO_2-Al_2O_3 Ceramic Composites

作　　者：王玉春[1] 丘泰[1] 沈春英[1] 

机构地区：[1]南京工业大学材料学院,南京210009

出　　处：《硅酸盐通报》2004年第1期35-39,共5页Bulletin of the Chinese Ceramic Society

基　　金：江苏省高技术研究项目 (BG2 0 0 2 0 2 2 5 )

摘　　要：采用工业ZrO2 ,Al2 O3 为原料 ,通过适当的工艺制备出ZrO2 -Al2 O3 复相陶瓷。研究结果表明 :添加Al2 O3 可有效地抑制ZrO2 晶粒的生长 ,有利于使ZrO2 晶粒以亚稳四方相存在 ,从而提高材料的强度与断裂韧性。Al2 O3 质量分数为 2 0 %时 ,复相陶瓷的抗弯强度、断裂韧性分别为 6 76 .7MPa ,10MPa·m1/ 2 。In this paper,ZrO 2-Al 2O 3 ceramic composites were prepared with commercial ZrO 2 and Al 2O 3 powers by means of appropriate technique.The experimental results show that the grain growth of ZrO 2 is inhibited by introduction of Al 2O 3,which is in favor of leaving large amount of metastable tetragonal ZrO 2 in the body and results in higher strength and toughness of ceramics.When the addition of alumina is 20wt%,the bending strenghth and fracture toughness of the composites are 676.7MPa and 10MPa·m 1/2respectively.The mechanical propertise are improved by the dispersion toughening of alumina grain and the phase transformation toughening of zircoina.

关 键 词：ZrO2-Al2O3复相陶瓷 制备工艺 颗粒弥散增韧 相变增韧 力学性能 

分 类 号：TQ174.758.11[化学工程—陶瓷工业]