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在高纯原料配制的、以五瓣星状初晶硅形态为主的Ａｌ－２２％Ｓｉ高硅过共晶合金中加入少量的Ｎａ、Ｓｒ、Ｐ变质或细化元素，考察了它们对初晶硅形态的影响。研究分析表明，Ｎａ强烈抑制Ｓｉ原子团簇之间的五重孪晶凝并，破坏五瓣星状初晶硅自发形核，同时也影响初晶硅的生长过程。Ｓｒ基本不影响Ｓｉ原子团簇间的孪晶凝并形核，在初晶硅生长过程中嵌入界面并诱发孪晶。Ｓｒ主要影响初晶硅的生长过程。Ｐ促使初晶硅的自发形核，对其生长过程没有影响。
In the preparation of high-purity raw materials, five-star primary silicon form Al-22% Si high silicon hypereutectic alloy by adding a small amount of Na, Sr, P metamorphic or refined elements, investigated their early Effect of crystalline silicon morphology. The results show that Na strongly inhibits the condensation of pentagonal twin between Si clusters, destroys the spontaneous nucleation of five star-shaped primary Si and also affects the growth of primary Si. Sr basically does not affect the nucleation and nucleation of the twin crystals between Si atomic clusters, and intercalates the interface and induces twins during the growth of primary Si. Sr mainly affects the growth of primary silicon. P promotes the spontaneous nucleation of primary silicon and has no effect on its growth.