Investigation on Structure and Properties of Y,La-Co-stabilized Zirconia Ceramics By Microwave Sintering

摘要：

　　Yttria and Lanthana co-stabilized zirconia ceramics with good room temperature mechanical properties of were successfully prepared by microwave hybrid sintering with a multi-mode cavity at 2.45 GHz from 1400℃ to 1600℃.SEM and XRD techniques were used to study the microstructure and phase composition.Meanwhile,microhardness,bending strength,toughness,and relative density were tested to characterize the mechanical properties.Archimedes drainage law and indentation test were used in our study for density and microhardness,toughness determination,respectively.A full dense(relative density,99%)and highly homogeneous microstructure wereo bserved with the grain size of 500 nm(in 3Y-1La-PSZ,at 1550℃)which is much smaller than the un-doped simples(about 1 μm).The optimized microwave sintering temperature is~1550 ℃ for 30 min with toughness,bending strength and high hardness of 188.9 Mpa,7.68 Mpa·m1/2and 14.3 Gpa,respectively.

关键词： zirconia Ceramics La2O3 addition homogeneous microstructure mechanical properties microwave sintering

作者: CHEN Yongqiang FAN Bingbing. YANG Bingquan LI Sai LIU Guoqi LI Hongxia

作者单位: School of Materials Science and Engineering,Zhengzhou University,Henan 450001,China School of Materials Science and Engineering,Zhengzhou University,Henan 450001,China;Sinosteel Luoyan Sinosteel Luoyang Institute of Refractories Research Co.,Ltd.,Luoyang 471039,China

会议类型: 国际会议

会议名称: Conference on Refractories International 2018, CRI2018)(2018国际耐火材料学术会议)

会议地点: 杭州

会议语种:英文

页码: 1-6

在线出版日期: 2018-10-17（万方平台首次上网日期，不代表论文的发表时间）