Table 3.

Micro-mechanical characteristics of the studied coatings at room temperature.

Coatings	Hardness, GPa	Reduced Elastic Modulus, GPa	H/Er Ratio	H3/Er2 Ratio	Adhesion to the Substrate, Lc2, N
Ti0.2Al0.55Cr0.2Si0.03Y0.02N/Ti0.25Al0.65Cr0.1N Multilayer (coating A)	28.4 ± 4.8	361.1 ± 36	0.0789	0.1774	55.22
Ti0.2 Al 0.52Cr0.2Si0.08N/Ti0.25Al0.65Cr0.1N Multilayer (coating B)	39.7 ± 4.5	427.2 + 36	0.0929	0.3431	50.19
Ti0.18Al0.55Cr0.17Si0.05Y0.05N/Ti0.25Al0.65Cr0.1N Multilayer (coating C)	37.6 ± 4.3	417.3 + 34	0.0904	0.3087	55.09