| 摘要 |
<p>This invention refers to a piston ring, particularly planned for use in internal combustion engines or compressors, including at least one metallic base (2) to which it is applied, by the physical vapor deposition (PVD) process, a multilayer coating (3) including a periodicity (P), formed by at least one first layer (5) and at least one second layer (5'), being the layers adjacent, bringing one first layer (5) predominantly formed by metallic chromium (5) and one second layer predominantly formed by ceramic chromium (5').</p> |
