RESEARCH OF TRIBOLOGICAL PROPERTIES OF Al65Cu20Fe15 QUASICRYSTALLINE COATINGS OBTAINED BY HVOF METHOD

This research investigates the tribological properties and microhardness of Al₆₅Cu₂₀Fe₁₅ quasicrystalline coatings deposited on U8G tool steel using the high-velocity oxy-fuel (HVOF) method. Special attention is given to the effect of air supply pressure (1.9 bar, 2.1 bar, 2.3 bar) on the wear resistance of the coatings. The research was conducted using the ball-on-disk method, while the microstructure was analyzed with a scanning electron microscope (SEM). The coating deposited at a propane pressure of 2 bar, oxygen pressure of 2.1 bar, and air pressure of 2.1 bar exhibited the smallest wear track width (902 µm) and a stable friction coefficient (μ ≈ 0.4), confirming its wear resistance. The Vickers microhardness of the coating reached 800 HV, indicating high strength. These findings highlight the potential of quasicrystalline coatings for use in high-wear environments, particularly in the aerospace, automotive, and mechanical engineering industries. The research aligns with the Sustainable Development Goals, specifically the "Industry, Innovation, and Infrastructure" initiative, by contributing to the development of wear-resistant coatings with enhanced performance characteristics.