Microhardness of gas-dynamic coatings from aluminum powder multi-reinforced with fullerenes and aluminum oxide

This study presents data on the influence of aluminum oxide content in the powder mixture on the microhardness of gas-dynamic coatings based on the nanocomposite powder AlMg6/C60. The synthesis of the powders was carried out through a two-stage high-energy processing of the initial components in a planetary ball mill. Powder characterization was conducted using scanning electron microscopy, granulometric analysis, and X-ray phase analysis. The obtained powders were used for cold gas-dynamic spraying. Microstructure analysis of the coatings revealed a uniform distribution of reinforcing particles throughout their volume. It was established that the addition of 10–50 wt.% Al2O3 into the powder mixture, along with mechanical treatment in the planetary mill, increases the coating’s microhardness by approximately 30–45% compared to the material reinforced solely with C60. The research was carried out within the state assignment in the field of scientific activity of the Ministry of Science and Higher Education of the Russian Federation (theme FZUN-2024-0004, state assignment of the VlSU).