Y_2O_3对氧化锆陶瓷组织和性能的影响  

Effects of Y_2O_3 on microstructure and properties of zirconia ceramics

作　　者：凤亚军 王兴庆[1] 

机构地区：[1]上海大学材料科学与工程学院,上海200444

出　　处：《上海大学学报（自然科学版）》2018年第1期56-65,共10页Journal of Shanghai University:Natural Science Edition

摘　　要：研究了氧化钇(Y_2O_3)添加量对氧化锆陶瓷组织和性能的影响,重点探讨了高能球磨工艺和Y_2O_3添加量对氧化锆晶粒度、组织结构和力学性能的影响.结果表明:通过高能球磨可降低ZrO_2,Y_2O_3混合粉末的颗粒度,达到细化氧化锆陶瓷晶粒度的目的,提升氧化锆陶瓷的力学性能;适量加入Y_2O_3,采用常规的烧结工艺可以获得维氏硬度为1 128 kg/mm^2和断裂韧性为10.03 MPa·m^(1/2)的细晶粒3Y-ZrO_2氧化锆陶瓷.The influence of addition of Y2O3 on microstructures and properties of zirconia ceramics was studied. The influence of ball milling time and the amount of added Y2O3 on grain size, microstructures and properties of ZrO2 is discussed. The results show that grains of ZrO2 and Y2O3 can be refined, and the grain size of zirconia ceramic reduced, leading to improved mechanical properties of ceramics. Fine-grained 3Y-ZrO2 ceramics can be prepared by appropriate addition of Y2O3 and a common sintering process with good mechanical properties, that is, Vickers hardness and fracture toughness values being 1 128 kg/mm2 and 10.03 MPa.m1/2, respectively.

关 键 词：氧化钇 氧化锆 高能球磨 力学性能 断裂韧性 

分 类 号：TB484.5[一般工业技术—包装工程]