Microstructural evolution and its effects on mechanical properties of spray deposited SiC_p/8009Al composites during secondary processing  

作　　者：陈志钢 陈振华 陈鼎 贺毅强 陈刚 

机构地区：[1]College of Materials Science and Engineering,Hunan University

出　　处：《中国有色金属学会会刊：英文版》2009年第5期1116-1120,共5页Transactions of Nonferrous Metals Society of China

基　　金：Project(50304008)supported by the National Natural Science Foundation of China

摘　　要：15%(volume fraction)SiCp/8009Al metal matrix composites(MMCs)prepared by spray co-deposition were hot-extruded and rolled to investigate the effects of porosity and local SiCp clusters on mechanical properties.The microstructures were examined by using optical microscopy(OM),scanning electron microscopy(SEM),X-ray diffractometry(XRD)and transmission electron microscopy(TEM).The mechanical properties were measured by tensile testing.The experimental results show that lamellar structure is composed of pores and SiCp clusters and can be improved by secondary processing,enhancing mechanical properties. The main strengthening mechanism and fracture behavior of MMCs were discussed too.15% （volume fraction） SiCp/8009Al metal matrix composites（MMCs） prepared by spray co-deposition were hot-extruded and rolled to investigate the effects of porosity and local SiCp clusters on mechanical properties. The microstructures were examined by using optical microscopy（OM）, scanning electron microscopy（SEM）, X-ray diffractometry（XRD） and transmission electron microscopy（TEM）. The mechanical properties were measured by tensile testing. The experimental results show that lamellar structure is composed of pores and SiCp clusters and can be improved by secondary processing, enhancing mechanical properties. The main strengthening mechanism and fracture behavior of MMCs were discussed too.

关 键 词：金属基复合材料 二次加工 机械性能 微观结构 扫描电子显微镜 透射电子显微镜 SIC颗粒 喷雾 

分 类 号：TB33[一般工业技术—材料科学与工程]