工程陶瓷材料动态断裂性能的研究及测定  

Determination and Study on Dynamic Fracture Behaviour of Engineering Ceramics

作　　者：孙国芳[1] 凌霄[1] 沈佳球[1] 廉华[1] 潘明 杨豪[1] 

机构地区：[1]上海材料研究所,上海20437

出　　处：《机械工程材料》1993年第1期13-16,共4页Materials For Mechanical Engineering

摘　　要：研究并测定了Al_2O_3和Si_3N_4两类工程陶瓷的动态起裂韧性,给出了K_(1d)(t)～K_1(t)曲线。曲线的最低值K_(1d)~m位于K_1(t)较低的范围,其断口特征与加载速率相关。材料成分的变化对其动态起裂性能影响较大。上述研究对工程陶瓷材料在动荷下的安全设计及可靠性均有指导意义。The dynamic fracture initiation toughness of engineering ceramics Al_2O_3 and Si_3N_4 was determined and studied. The K_(1d)--K_1 curve was given, the lowerst value K_(ld)~m of the curve laid in a lower K_1 range, the fact of fractomicrographs are relative with the loading rates were analysed. A change of the component has a great effect on the dynamic fracture initiation behaviour. To safe design and reliable use of the engineering ceramics, it gives an ideal guide.

关 键 词：断裂动力学 动态起裂韧性 工程陶瓷 

分 类 号：TH145.11[一般工业技术—材料科学与工程]