摘要
利用扫描和透射电子显微镜及X rays衍射仪等,对ZrO2层状复合陶瓷的显微形貌特征、断裂相变量及晶体学位向关系进行了深入研究。研究结果表明,ZrO2层状陶瓷由于界面压应力的作用,抑制了烧结过程中晶粒的生长速度及冷却后四方相向单斜相的转变,提高了可相变四方相的含量,提高了断裂相变量,改善了材料的力学性能,但却没有改变四方相和单斜相之间的晶体学位向关系,在层状ZrO2陶瓷中,(100)m//(010)t的晶体学位向关系仍然存在。
The micro-appearance feature, the formation of twin lines of monoclinic, the phase transformation and the crystal orientation relationship of ZrO2 laminated ceramics were studied by scanning electron micro scopy (SEM), transmission electron microscopy (TEM), X-ray instruments, etc. The experimental results show that the interface compressive stress can decrease the rate of the grain growth, control the transformation of tetragonal phase during sintering, raise the amount of the transformable tetragonal phase and strengthen the transformation effect, but can not change the crystal orientation relationship between tetragonal phase and monoclinic phase, while (100)m//(010)t still exist.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2005年第1期59-63,共5页
Acta Materiae Compositae Sinica
基金
国家自然科学基金项目(59995440)
关键词
ZrO2层状复合陶瓷
界面压应力
显微形貌
相变
晶体学位向关系
Compressive strength
Crystal orientation
Grain growth
Interfaces (materials)
Laminates
Microstructure
Phase transitions
Sintering
Zirconia
