Conclusions
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1.
In the Al-Si system with a silicon content between 12.7 and 20.3%, preferential interaction between different Al-Si atoms occurs during significant superheating.
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2.
The formation of metastable phases is possible during crystallization of vigorously superheated melts of the Al-Si system: cubic−χ, orthorhombic−η (a=0.74525 nm, b=0.78134 nm, c=0.57579 nm), and hexagonal−ω (a=0.50597 nm, c=0.110255 nm), which decompose on cooling into stable phases — an α-solid solution and silicon.
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Dnepropetrovsk Metallurgical Institute. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 3, pp. 50–56, March, 1985.
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Mazur, V.I., Kutsova, V.Z. & Uzlov, K.I. Structure formation in silumins during rapid crystallization. Met Sci Heat Treat 27, 227–233 (1985). https://doi.org/10.1007/BF00699660
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DOI: https://doi.org/10.1007/BF00699660