Coating additive

摘要

Various methods including applying a coating material with an additive to an article are disclosed. The coating material may be in a powder form before a thermal spraying used to apply the coating material. The coating material may comprise a chromium nitride, a chromium carbide, a chromium silicide, or a tungsten carbide. Additional materials may be added, e.g., a molybdenum alloy such as molybdenum-chromium. In one aspect, thermal spraying includes melting the coating material, propelling the molten coating material toward the article to be coated, and coating the article with the molten coating material. In another aspect, the coated article is one or more piston rings.

主权项

1. A coated article, comprising:
a metallic substrate; and a coating layer on an outer surface of the substrate, the coating layer having a chromium nitride material and an additive of a molybdenum-chromium alloy; wherein the chromium nitride material is formed from a plurality of powder particles each having a core and an outer nickel layer, the core being formed from an intermediate layer of CrN cooperating with a Cr2N powder particle.