铸造氧化铝／锌合金复合材料界面的SEM观察

利用挤压铸造制备氧化铝／锌合金复合材料，在扫描电镜（SEM）上观察复合材料的界面。在复合材料中纤维与基体间存在致密界面层，合金元素通过适当的化学反应可改善纤维与基体间的结合，在凝固过程中，纤维／基体界面上的硅在共晶体的生长过程中起到领先作用，导致复合材料的共晶转变是由铝硅共晶转变和锌铝共晶转变两者组成。

SEM Observation on Interfaces of Cast Al2O3/Zn Alloy Composites

Alumina/Zinc alloy compsites were manufactured by squeeze casting, and the interfaces of the composite were observed on scanning electronic microscope(SEM). The results indicate that there is the fine and close interface between the fiber and the matrix, and that alloy elements can improve combination between the fiber and the matrix in the composites. During the solidification of the composites, the silicon on the interface between the fiber and the matrix plays a leading role during the coupled growth of the eutectic so that the eutectic transformation of the composites consists of Al Si eutectic transformation and Zn Al eutectic transformation.