| Abstract Scope |
Wear damage compromises the integrity and performance of critical components, leading to energy loss, economic impact, and higher CO2 emissions. Industries including aerospace, automotive, metal forming, and steel production require materials with excellent wear resistance under elevated temperatures and oxidative atmospheres. Under such severe conditions, metals and alloys inevitably oxidize, with a sintered glaze layer formed to prevent direct contact with the counter surface and reduce wear. The tribological performance of oxidation is critical for high-temperature wear applications. Recently, Co-free medium- and high-entropy alloys have been developed to improve the cost-effectiveness and address Co supply limitations, while maintaining high strength and great ductility. However, kinetically favoured Co oxides have been reported to promote glaze layer formation. We examine the wear behaviours of FeCrNi and FeCoCrNi from room temperature up to 1000 °C, providing insights into the role of Co in the design of wear-resistant materials. |