Tribological Characteristics of PEO Layers Synthesized on Al–Ti–Cu Coatings

The tribological characteristics of oxide layers synthesized by plasma electrolytic oxidation (PEO) in a weakly alkaline electrolyte in the pulsed cathodic-anodic mode on plasma Al–Ti–Cu coatings sprayed on a D16 aluminum alloy substrate are investigated. It is established that in the PEO layer–steel ball friction pair the highest wear resistance is provided by selective transfer conditioned by the presence of copper in the layer structure, and in the PEO layer–ceramic ball friction pair by the presence of high-strength Al2TiO5 phase.