Tribological Behavior of APS-Sprayed CuNiIn Coatings Under Sliding Against Al₂O₃ at Room Temperature and 450 °C

Cu-based coatings are promising materials for protecting aerospace and industrial components subjected to friction and wear. Atmospheric Plasma Spraying (APS) is a widely used thermal spray process for depositing such coatings, although the resulting microstructure can significantly influence tribological performance. In this work, CuNiIn coatings deposited by APS were investigated by sliding wear tests against an Al₂O₃ ball at room temperature and 450 °C. Microstructural examination and wear-track analyses were conducted to evaluate the influence of temperature on the friction and wear response of the coating. The study highlights the temperature dependence of the sliding wear behavior of APS-sprayed CuNiIn coatings and provides further understanding of their potential for applications involving elevated-temperature contact conditions.