| 摘要 |
<p>The present invention relates to a piston ring designed in particular for use in internal combustion engines or compressors, and comprising at least one metallic base (2) to which is applied by physical vapour deposition (PVD) a multilayer coating (3) with a periodic repetition (P) of at least one first layer (5) and at least one second layer (5') adjacent to the first, where a first layer (5) is mainly composed of chromium metal (5) and a second layer is mainly composed of chromium ceramic (5').</p> |
