The modification mechanism of the eutectic Si in Al-Si cast alloy and the characters of the (modi-)fiers commonly used were reviewed in this paper.

• 利用挤压铸造制备了氧化铝纤维增强铝硅合金复合材料,在扫描电镜上观察了复合材料中的共晶硅形貌,研究了共晶硅变质机制。