PISTON RING COMPRISING A PVD COATING

摘要

The invention relates to a piston ring for an internal combustion engine, consisting of an iron-based material and comprising an anti-wear coating (3) at least in the vicinity of the bearing surface (2). Said coating is applied according to the PVD method and consists substantially of chromium nitride. Nitrides, which are formed from the elements aluminium, and/or silicon and/or zirconium, are embedded in the anti-wear coating (3) and the maximum thickness of said coating is 70ñm and in particular between 5 and 50ñm.