Seal system

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 152 KB
• Volume: 2011
• Category: Article
• ISSN: 1350-4789
• DOI: 10.1016/s1350-4789(11)70232-x

✦ Synopsis

Applicant: Mahle Metal Leve S/a, Brazil This patent describes a piston ring, particularly devised for use in internal combustion engines or compressors. It consists of a metallic base to which is applied -by physical vapour deposition -a coating of chromium nitride that has a periodicity (P), formed from at least two adjacent layers. Each layer has a predominantly chromium nitride phase that is different from the adjacent layer.