Improvement of Corrosion and Wear Resistance of CoCrNiSi Medium-Entropy Alloy by Sputtering CrN Film.

In this study, Co, Cr, and Ni were selected as the equal-atomic medium entropy alloy (MEA) systems, and Si was added to form CoCrNiSi MEA. In order to further improve its wear and corrosion properties, CrN film was sputtered on the surface. In addition, to enhance the adhesion between the soft CoCrNiSi substrate and the super-hard CrN film, a Cr buffer layer was pre-sputtered on the CoCrNiSi substrate.