摘要
用热压方法制得了含有氧化镱的高强度、高韧性四方相氧化锆陶瓷材料(Yb-TZP)。研究了试样断裂表面的相变Yb-TZP的抗弯强度和断裂韧性均与试样在断裂过程中由四方相到单斜相的相变量成正比,同时还受到晶粒大小的影响。X射线衍射图表明具有与热压方向垂直的c轴取向的四方相ZrO_2在断裂时较容易相变成单斜相。
The tetragonal zirconia polycrystals containing ytterbia (Yb-TZP) with high flexural strength and fracture toughness were obtained by use of hot pressing. The phase transformation of the fracture surface has been studied. The flexural strength and fracture toughness of Yb-TZP are proportional to the amount of monoclinic phase increased during fracture and grain size also has a pronounced effect on the mechanical properties. XRD analysis shows that the tetragonal grains with c-axis perpendicular to the hot press direction tend to undergo phase transformation more easily.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
1989年第5期406-411,共6页
Journal of The Chinese Ceramic Society
关键词
氯化镱-四方相氯化铬
增韧陶瓷
相变
力学性能
ytterbia-tetragonal zirconia
toughening ceramics
phase transformation
mechanical properties
