PSZ(3Y)含量对Al_2O_3陶瓷力学性能的影响  

EFFECT OF PSZ(3Y) CONTENT ON THE MECHANICAL PROPERTIES OF A12O3 CERAMIC

作　　者：马伟民[1] 修稚萌[1] 闻雷[1] 孙旭东[1] 铁维麟[2] 

机构地区：[1]东北大学材料与冶金学院,沈阳110004 [2]沈阳大学基础部,沈阳110041

出　　处：《金属学报》2003年第9期999-1003,共5页Acta Metallurgica Sinica

基　　金：国家自然科学基金资助项目50172010

摘　　要：对部分稳定ZrO2(简称PSZ(3Y))含量与Al2O3基陶瓷烧结致密化及力学性能的关系进行了测试,用X射线衍射定量相分析计算了m-ZrO2和t-ZrO2相在断裂前后相含量的变化.结果表明:当Al2O3中添加15％(体积分数)PSZ(3Y)时,1550℃真空烧结后Al2O3基复合陶瓷的抗弯强度达到884 MPa,断裂韧性达到8.2 MPa·m1/2.PSZ(3Y)的相变增韧提高了Al2O3/PSZ(3Y)复合陶瓷材料的抗弯强度和断裂韧性.The content of partially stabilized Zirconia has remarkable influence on densifica-tion and mechanical properties of Al2O3/PSZ(3Y) ceramic composites. When the composite with 15%PSZ(3Y) (volume fraction) was vacuum-sintered for 2 h at 1550℃, its fracture toughness and bending strength reach 9.8 MPa·m1/2 and 884 MPa, respectively. The change of m-ZrO2 and t-ZrO2 phase contents before and after fracture was measured by X-ray diffraction quantitative phase analysis, and the results confirms that the improvement in bending strength and fracture toughness of the composite is due to the transformation toughening of PSZ(3Y).

关 键 词：A12O3/PSZ(3Y)复合陶瓷 真空烧结 X射线衍射 相变增韧 力学性能 

分 类 号：TG174.453[金属学及工艺—金属表面处理] TG113.25[金属学及工艺—金属学]