氮化硅/碳化硅纳米陶瓷的显微组织与抗弯性能  

Analysis of Microstructure and Bend Properties of Si_3N_4/SiC Nanoceramic Composite Materials

作　　者：晏建武[1] 张晨曙[1] 王伟兰[1] 李卫超[1] 艾云龙[1] 

机构地区：[1]南昌航空工业学院材料科学与工程系,江西南昌330034

出　　处：《机械工程材料》2003年第9期18-20,35,共4页Materials For Mechanical Engineering

摘　　要：研究了氮化硅/碳化硅纳米复合陶瓷经三点弯曲试验后的显微组织和断口形貌。结果表明,随着SiC纳米粉含量的增加,断口从沿晶断裂向穿晶断裂过渡;当SiC的质量分数是15%时,复合陶瓷的显微组织明显细化,抗弯强度、断裂韧度明显提高。The microstructure and fracture morphology after bend test were investigated. The results show that with the adding of nanosized SiC particle, the fracture morphology of SiC/Si3N4 nanoceramic composite materials changes from intergranular fracture transgranular fracture. The addition of 15wt% nanosized SiC significantly improves bend strength, fracture toughness and microstructure. 

关 键 词：纳米复合陶瓷 显微组织 断口分析 

分 类 号：TB383[一般工业技术—材料科学与工程] TB321