反应热压烧结制备(SiC,CNTs)/ZrB_2陶瓷复合材料及其性能研究  

Preparation and Characterization of(SiC,CNTs)/ZrB_2 Ceramic Composites by Reactive Hot Pressing

作　　者：魏红康[1] 赵林[1] 汪长安[1,2] 谢志鹏[1,2] 邓翔宇[1] 

机构地区：[1]景德镇陶瓷学院,江西景德镇333403 [2]清华大学,北京100084

出　　处：《中国陶瓷工业》2014年第5期1-4,共4页China Ceramic Industry

基　　金：国家自然科学基金项目(编号:51102120;51202097);景德镇市科技计划项目;景德镇陶瓷学院博士科研启动项目资助

摘　　要：以硅、活性碳和碳纳米管为添加剂,在1900℃、30 MPa条件下制备出了(Si C,CNTs)/Zr B2陶瓷基复合材料。研究了CNTs添加量对复合材料致密度和力学性能的影响。借助X射线衍射和扫描电镜分析了复合材料的物相组成和微观结构。研究结果表明:随着CNTs含量的增加,复合材料的致密度和力学性能呈先增加后减小的变化趋势。复合材料力学性能的提高主要归因于致密度的提高、晶粒的减小和CNTs的桥联、拔出机制。（SiC,CNTs）/ZrB2 ceramic matrix composites were prepared at 1900 ℃ under 30 MPa. The effects of CNTs additions on densities and mechanical properties of the composites were studied. Phase composition and microstructure of the composites were analyzed by XRD and SEM. The results indicate that the relative density and mechanical properties first increased with increasing CNTs content, and thereafter decreased. The increased mechanical properties of the composites are mainly attributed to the increasing of the relative density, the grain size reduction and the pulling out and bridging of CNTs.

关 键 词：二硼化锆 碳纳米管 力学性能 微观结构 

分 类 号：TQ174.75[化学工程—陶瓷工业]