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Phase Diagram of the Al-Ca-Fe-Si System and Its Application for the Design of Aluminum Matrix Composites

  • Aluminum: New Alloys and Heat Treatment
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Abstract

The phase composition of aluminum alloys in the Al-Ca-Fe-Si system, including the distribution of phases in the solid state and solidification reactions, has been studied. It is shown that the addition of iron and silicon to Al-Ca alloys leads to the formation of ternary Al2CaSi2 and Al10CaFe2 compounds. The equilibrium between these compounds implies the occurrence of the quaternary L → Al + Al4Ca + Al2CaSi2 + Al10CaFe2 eutectic reaction. The alloys near this eutectic have the best structure, which is typical of aluminum matrix composites. It is shown that Al-Ca alloys can have high manufacturability during both shape casting and rolling. This is due to the combination of a narrow temperature range of solidification and a favorable morphology for the eutectic, which has a fine structure. The combination of the mechanical and physical properties of the Al-Ca eutectic-based alloys significantly exceed those of branded alloys based on aluminum–silicon eutectics.

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Acknowledgements

This work was financially supported by the Ministry of Education and Science of the Russian Federation (Project No. 11.7172.2017/8.9).

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Authors and Affiliations

  1. National University of Science and Technology MISiS, Moscow, Russia, 119049

    Nikolay A. Belov, Evgeniya A. Naumova, Torgom K. Akopyan & Vitaliy V. Doroshenko

  2. Baikov Institute of Metallurgy and Material Science RAS, Moscow, Russia, 119991

    Torgom K. Akopyan

Authors
  1. Nikolay A. Belov
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  2. Evgeniya A. Naumova
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  3. Torgom K. Akopyan
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  4. Vitaliy V. Doroshenko
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Corresponding author

Correspondence to Torgom K. Akopyan.

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Belov, N.A., Naumova, E.A., Akopyan, T.K. et al. Phase Diagram of the Al-Ca-Fe-Si System and Its Application for the Design of Aluminum Matrix Composites. JOM 70, 2710–2715 (2018). https://doi.org/10.1007/s11837-018-2948-3

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  • DOI: https://doi.org/10.1007/s11837-018-2948-3

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