Effect of Thermal Treatment on Microstructure and Phase of Partially-stabilized Zirconia  

作　　者：胡永刚 肖建中 XIA Feng ZHANG Haibo 

机构地区：[1]College of Material Science and Engineering, Huazhong University of Science and Technology

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2013年第3期483-486,共4页武汉理工大学学报（材料科学英文版）

摘　　要：ZrO2-MgO-YzO3-CaO-Al203 composites with a multiphase microstructure were fabricated by die pressing process and sintered at various thermal programs. The microstructure of this polycrystalline was examined to clarify the role of A1203 on grain growth. Environmental scanning electron microscopy （ESEM） micrographs revealed that spinel was beneficial to refine grain. The effect of thermal treatment on the formation of monoclinic phase was discussed. It can be found that, the grain size and the fraction of the monoclinic phase in this partially stabilized zirconia（PSZ） increases after heat treatment at 1 150 ℃. The temperature of heat- treatment, not the time for holding, is the governing factor of the fraction of monoclinic phase.ZrO2-MgO-YzO3-CaO-Al203 composites with a multiphase microstructure were fabricated by die pressing process and sintered at various thermal programs. The microstructure of this polycrystalline was examined to clarify the role of A1203 on grain growth. Environmental scanning electron microscopy （ESEM） micrographs revealed that spinel was beneficial to refine grain. The effect of thermal treatment on the formation of monoclinic phase was discussed. It can be found that, the grain size and the fraction of the monoclinic phase in this partially stabilized zirconia（PSZ） increases after heat treatment at 1 150 ℃. The temperature of heat- treatment, not the time for holding, is the governing factor of the fraction of monoclinic phase.

关 键 词：ceramic composite PSZ phase assemblage MICROSTRUCTURE 

分 类 号：O614.412[理学—无机化学]