Ti-Al-V-N hard coatings have been widely explored for wear-resistant applications. Introducing soft metal copper (Cu) into hard coating is expected to further improve the tribological performance. Herein, the effect of Cu content on the high-temperature tribological properties and oxidation behavior of Al-Ti-V-Cu-N coatings was studied. With increasing Cu content, the oxidation resistance of the coatings decreased, and promoted the formation of CuO oxide by out-diffusion of Cu at elevated temperatures. At 500 °C, all the coatings exhibited high friction coefficients of 0.84–0.97 due to limited tribo-oxidation. At 600 °C, with increasing Cu content, the friction coefficient decreased from 0.90 to 0.45, and then rebounded to 0.54, which can be attributed to the decrease of AlVO₄ phase and the presence of CuO phase. As Cu content increased above 10.7 at.%, a low wear rate of 10⁻¹⁶ m³/N·m was achieved due to the formation of V₂O₅ and CuO lubricating oxides on worn surfaces, and exhibited oxidation wear.

Ti-Al-VN 硬质涂层已被广泛用于耐磨应用。将软金属铜 (Cu) 引入硬涂层有望进一步提高摩擦学性能。本文研究了Cu含量对Al-Ti-V-Cu-N涂层高温摩擦学性能和氧化行为的影响。随着Cu含量的增加，涂层的抗氧化性降低，并通过Cu在高温下的外扩散促进了CuO氧化物的形成。在 500 °C 时，由于有限的摩擦氧化，所有涂层都表现出 0.84-0.97 的高摩擦系数。在600 ℃时，随着Cu含量的增加，摩擦系数从0.90下降到0.45，然后回升至0.54，这可以归因于AlVO _4的减少相和 CuO 相的存在。随着Cu含量增加到10.7 at.%以上，由于在磨损表面上形成V ₂ O ₅和CuO润滑氧化物，实现了10 ^-16  m ³ /N·m的低磨损率，并表现出氧化磨损。