| abstract |
The invention relates to a mechanical piece having a structure comprising a substrate ( 1 ) and at least one surface coating layer ( 3 ) of nanometric thickness, for improving mechanical resistance, characterized in that it comprises between the substrate and the surface coating layer an essentially non ceramic, non porous adhesion layer of nanometric size; and said surface coating layer is an essentially non porous barrier layer ( 2 ) consisting essentially of an essentially stoechiometric titanium nitride layer. |