Investigations of suitable hard coatings on nickel-based single-crystal superalloy (CMSX‐4)

► We have investigated hard coatings for a porous cutting tool. ► Diamond films can be deposited by CVD on nickel-based superalloy using SiC interlayer. ► Film adhesion is good if the substrate surface has a uniform roughness. ► AlTiN PVD films show good adhesion of Lc = 30 N on nickel-based superalloy. ► TiN interlayer can improve TiAlN adhesion up to Lc = 50 N.