Abstract
In this work, the formation of nanoscale phases in Al30Cu40Si30, Al33.3Cu33.3Si33.3 and Al60Cu20Si20 alloys as a result of rapid crystallization was investigated. For this purpose, the microstructure of alloys in the crystalline state after equilibrium and rapid crystallization was investigated by electron microscopy. The phase analysis of the alloys was carried out by the X-ray diffraction method, as a result of which it was established that aluminum, silicon and binary compounds based on aluminum and copper are present in the studied alloys. To explain the mechanism of formation of nanoscale phases during crystallization, the cluster structure and atomic composition of clusters in the liquid state before crystallization were investigated. The study of the atomic structure of alloys in the liquid state was carried out by the method of molecular dynamics. To check the accuracy of the models, the simulation results were compared with experimental data. From the analysis of the atomic configurations of the melts, the presence of clusters with a structure that corresponds to the structure of the crystalline phases was revealed. It was concluded that the presence of such atomic clusters causes the formation of nanoscale phases during rapid cooling.
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The authors would like to acknowledge the University of Wurzburg for providing the equipment for the FESEM investigation.
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Shtablavyi, I., Popilovskyi, N., Kulyk, Y. et al. Formation of nanoscale phases during rapid solidification of Al–Cu–Si alloys. Appl Nanosci 13, 7335–7347 (2023). https://doi.org/10.1007/s13204-023-02913-3
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DOI: https://doi.org/10.1007/s13204-023-02913-3