Preparation and Mechanical Properties of Zirconia Ceramics Doped with Different Y_(2)O_(3)Contents  

作　　者：SONG Yanwei ZHAO Xiaoqing WANG Aiyang XIONG Yan DONG Yanling WANG Weimin 

机构地区：[1]State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China [2]School of Materials and Chemical Engineering,Hubei University of Technology,Wuhan 430068,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2023年第6期1287-1292,共6页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Key Research and Development Plan of China(No.2021YFB3701401);the National Natural Science Foundation of China(Nos.92163208,51902233,51972243,51521001,and 51832003)。

摘　　要：The sintering behavior and mechanical properties of zirconia doped with 2.0mol%-3.0mol%Y_(2)O_(3)were studied by pressure-less sintering.The experimental results show that the densification temperature of zirconia ceramics increases gradually with the decrease of Y_(2)O_(3)doping content by which decreases the sintering driving force due to the lower oxygen vacancy concentration of the systems.Furthermore,the bending strength and fracture toughness of the prepared zirconia ceramics increase with the decrease of Y_(2)O_(3)doping content.It can be attributed to the fact that the phase stability of tetragonal zirconia decreases with the decrease of Y_(2)O_(3)doping content,which is easier to induce"phase transformation toughening"and dissipate impact energy.The relative density,bending strength and fracture toughness of 2.0 mol%Y_(2)O_(3)doped zirconia ceramics(2.0Y-ZrO_(2))sintered at 1525℃are 99.00%,1256.65±20.82 MPa and 9.85±0.13 MPa·m^(1/2),respectively.

关 键 词：yttria-stabilized tetragonal zirconia polycrystal(Y-TZP)ceramics sintering behaviors mechanical properties 

分 类 号：TQ174.1[化学工程—陶瓷工业]