Abstract
The peculiarities of the fine structure of Al–Si–Ni aluminum-matrix composite with a low thermal coefficient of linear expansion, mechanically activated with the addition of nanoscale reduced graphene oxide (RGO), is investigated. The structure is studied by X-ray diffraction analysis, scanning, transmission and high-resolution transmission electron microscopy. The presence of quasi-graphene layers on the surface of aluminum and silicon particles is detected and it is shown that this shell protects them from clumping upon mechanical alloying, which significantly increases the manufacturability of the process of mechanical activation and subsequent compaction. Thus, it is possible to obtain composite materials with a homogeneous structure and higher physical properties (the use of RGO instead of electrode graphite reduces the thermal coefficient of linear expansion (TCLE) of the composite by 10%).
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ACKNOWLEDGMENTS
The study was carried out as part of the State task of the Institute of Physics and Technology, Russian Academy of Sciences.
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Aronin, A.S., Aristova, I.M., Abrosimova, G.E. et al. Nanocarbon in the Structure of a Hypereutectic Aluminum-Matrix Composite. J. Surf. Investig. 14, 668–672 (2020). https://doi.org/10.1134/S1027451020040023
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DOI: https://doi.org/10.1134/S1027451020040023