“…However, Fuentes et al [29] and Warcholinski's group [30][31][32][33] pointed out that the residual stress of CrCN coatings was more intensive than CrN coatings, as well as rougher surface. On the other hand, higher density of surface particle, more defects and worse adhesion of TiCN coatings after C doping were reported in Refs.…”