| 摘要 |
The surface (15) of a sliding member, such as a piston ring (14), is coated with a compound containing at least chromium nitride. A columnar crystal structure is present in a tension fracture surface of the coating, the columns being aligned towards the coating surface from the substrate surface. A PVD process such as ion plating may be used to form the coating. The composition of the coating may be CrN, Cr2N or a mixture thereof in a uniform phase and the crystals of the coating are preferably oriented with the (111) face parallel to the surface. <IMAGE> |
