摘要
采用常压烧结工艺制备了Si3N4-Y2O3-La2O3陶瓷,并对Si3N4陶瓷的力学性能、相组成和显微组织进行了分析和讨论。结果表明:添加4%Y2O3～4%La2O3的复合稀土氧化物后,Si3N4陶瓷呈长柱状的β-Si3N4晶粒,抗弯强度为960MPa,断裂韧性为7.5MPa.m1/2,具有较好的力学性能。
Si3N4-Y2O3-La2O3 ceramics were fabricated by pressureless sintering,and the mechanical properties,phase composition and microstructure of the ceramics were studied and discussed.The results show that Si3N4 ceramic is made up of rod-like β-Si3N4 grains,its bending strength and fracture toughness are 960MPa and 7.5MPa·m1/2,when 4%Y2O3-4%La2O3 is added.
出处
《陶瓷学报》
CAS
北大核心
2012年第1期66-68,共3页
Journal of Ceramics
基金
九江学院校级科研项目(编号:10kj09)
大学生自主创新性试验项目(编号:10XSCXXSY15)
关键词
稀土氧化物
氮化硅
力学性能
显微组织
rare earth oxides
Si3N4
mechanical property
microstructure
