碳化硅颗粒增强的铝基复合材料界面微结构研究  

Interfacial characteristics of SiC particles reinforced aluminum matrix composites

作　　者：施忠良[1] 刘俊友[2] 顾明元[1] 刘国权[2] Lee Jae-chul 

机构地区：[1]上海交通大学金属基复合材料国家重点实验室,上海200030 [2]北京科技大学材料科学与工程学院,北京100083 [3]Division of Materials Science and Engineering

出　　处：《电子显微学报》2002年第1期52-55,共4页Journal of Chinese Electron Microscopy Society

基　　金：国家自然科学基金资助项目 (No .5 97710 70 ;5 963 10 80 )~~

摘　　要：通过X射线衍射、场发射扫描电镜和透射电镜观察并研究了SiC颗粒增强的铝基复合材料界面组织组成、特征及其反应产物的微观形貌 ,直观给出了SiC颗粒与铝反应生成的Al4 C3立体形貌为六方片状结构 ,发现在SiC颗粒和铝合金基体的界面处为偏析形成的层片状共晶结构θ CuAl2 和硅相 ,表明该产物是最后凝固的多元共晶组织 ,即最后凝固部位是在SiC颗粒和基体铝合金的界面处。上述结果有助于了解。The interfacial reaction and its characteristics of aluminum matrix composites with SiC particles as reinforcement were identified and observed by X ray diffaction, FE SEM (field emission scanning electron microscopy) and TEM (transmission electron microscopy). Three dimensional morphology of Al 4C 3 formed at the surface of SiC particles showed hexagonal platelet shape and a part of the last solidification zone also distributes along the interface between SiC particles and aluminum matrix and it showed the eutectic structure of both θ CuAl 2 and Si due to the segregation during solidification. The results are good to control effectively the interfacial reaction and its microstructure.

关 键 词：透射电镜 界面 铝基复合材料 碳化硅 颗粒增强 显微结构 

分 类 号：TB331[一般工业技术—材料科学与工程] O485[理学—固体物理]