金属基复合材料的界面分析

用透射电镜、扫描电镜、Ｘ射线能谱仪和电子探针研究了碳化硅颗粒（ＳｉＣｐ）增强Ａｌ２０１４复合材料的微观结构和界面。鉴定了界面上和基体中三种主要的沉淀相：ＣｕＡｌ２、Ｃｕ２Ｍｇ８Ｓｉ６Ａｌ５、（Ｍｎ，Ｆｅ）３ＳｉＡｌ１２和高温下形成的条状Ａｌ４Ｃ３。试验指出，碳化硅和基体间的界面上没有Ｓｉ和Ａｌ的相互扩散，并观察分析了ＳｉＣｐ／Ａｌ２０１４界面周围的无析出带和高密度位错

Interfacial Analysis of Metal matrix Composites

The interface and microstructure of the Al 2014 composites reinforced by SiC p particles have been characterized by transmission electron microscopy,scanning electron microscopy, X ray energy dispersive spectrometry and electron probe microanalyzer. At the interface between the SiC p and Al 2014 phases, three major intermetallic phases have been identified,namely, CuAl 2,Cu 2Mg 8Si 6Al 5, and (Mn, Fe) 3SiAl 12 . Lath like Al 4C 3 particles are also formed at high temperatures. Diffusion of silicon and aluminum across the interface between SiC p and the matrix has not been found.However, precipitate free zones and high density dislocation around the SiC p particles were observed.