РОЗРОБКА ТЕРМОСТІЙКИХ ПОКРИТТІВ ТРИБОТЕХНІЧНОГО ПРИЗНАЧЕННЯ НА ОСНОВІ МЕТА-АРАМІДУ

Abstract

Research on the tribotechnical properties of composite coatings is relevant due to its potential impact on industry, tech-nology, and environmental standards. In the conducted study, tribotechnical properties of composite coatings based on meta-aramid were investigated under dry friction conditions with a load of 1 MPa and a sliding speed of 1 m/s. The results showed that the amount of anti-friction filler significantly influences the friction and wear of coatings. Wear resistance increases up to 20 wt.%, after which the introduction of more filler stabilizes and leads to a decrease in this parameter. The most optimal amount of filler to achieve minimal wear is 20–25 wt.%.It was found that the anti-friction filler forms a lubricating film on the counterface surface, and its parameters depend on the filler concentration. At a high content (up to 20 wt.%), a sharp increase in wear resistance is observed. However, with an increase in the filler concentration above 25 wt.%, a deterioration in strength properties and an increase in the coating's brittleness are observed.Coatings with copper phthalocyanine demonstrated the most effective tribotechnical indicators when the filler concen-trationwas 20–25 wt.%. The wear intensity and friction coefficient of these coatings decreased by 2 and 2.1 times, respectively, compared to the original meta-aramid coating.Additional research on the tribotechnical properties of coatings in liquid environmentswith I-40 lubricant showed that with an increase in the specific load, the wear intensity increases, but this decreases with the addition of the anti-friction filler. At a specific load of 2.5–10 MPa, the wear resistance of the coatings decreased by 1.5–2.5 times, and the friction coefficient decreased by 2.1–3.6 times compared to the meta-aramid coating.The analysis of the results allows determining the optimal amount of filler for meta-aramid coatings as 20 wt.%, consid-ering tribotechnical properties.