Sliding element for an internal combustion engine, comprises a substrate and a coating obtained by thermal spraying of a powder comprising chromium, nickel, carbon and nitrogen

摘要

The sliding element comprises a substrate and a coating obtained by thermal spraying of a powder comprising chromium (40-79.9 wt.%), nickel (10-30 wt.%), carbon (0.1-5 wt.%) and nitrogen (10-20 wt.%). The powder comprises chromium nitride (CrN) and chromium carbide (Cr 3C 2) embedded in a nickel/chromium (Ni/Cr) matrix. The amounts of CrN and Cr 3C 2are 30-99.9 wt.% and 0.1-30 wt.%, respectively. The particle size of the powder is 5-65 mu m. The particle size of the carbide embedded in the Ni/Cr matrix is 1-5 mu m. The sliding element comprises a substrate and a coating obtained by thermal spraying of a powder comprising chromium (40-79.9 wt.%), nickel (10-30 wt.%), carbon (0.1-5 wt.%) and nitrogen (10-20 wt.%). The powder comprises chromium nitride (CrN) and chromium carbide (Cr 3C 2) embedded in a nickel/chromium (Ni/Cr) matrix. The amounts of CrN and Cr 3C 2are 30-99.9 wt.% and 0.1-30 wt.%, respectively. The particle size of the powder is 5-65 mu m. The particle size of the carbide embedded in the Ni/Cr matrix is 1-5 mu m. The layer thickness of the coating is up to 100 mu m. The thermal spraying comprises high-speed flame spray coating or plasma spraying. An independent claim is included for a method for producing a sliding element for an internal combustion engine.