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用余氏理论（固体与分子经验电子理论），分析了铝硅二元合金价电子结构，推断铝硅熔体中Si－Si原子之间的结合力最强，表明在馆位中存在Si原子的短程有序分布．同时根据熔体的微观不均匀性理论，建立了铝硅二元合金熔体的结构模型．
Using Yu’s theory (solid and molecular empirical electron theory), the valence electron structure of Al-Si binary alloys was analyzed, and it was deduced that Si-Si atoms in Al-Si melt had the strongest binding force, indicating that there were Si atoms Short-range orderly distribution. At the same time, the structure model of Al-Si binary alloy melt was established according to the theory of microscopic heterogeneity of melt.