Chrome nitride, produced by either arc evaporation or magnetron sputtering, is heavily used for its wear resistance properties, coating toughness and high temperature resistance.
Upon market introduction, the kind of Diamond Like Carbon (DLC) coating mostly used was metal DLC coating (Me-DLC). Metal DLC coating is applied on the engine component by magnetron sputtering technology. The coating has excellent features with regard to rolling contact fatigue. Typical applications for metal DLC coating are gears, bearings and turbo diesel injection parts.
Amorphous hydrogenated DLC (a-C:H)
Amorphous hydrogenated DLC coating (a-C:H) is applied by Plasma Assisted Chemical Vapour Deposition (PACVD) coating technology and microwave technology. With these technologies no expensive target materials are needed. A typical friction coefficient of DLC coating applied by PACVD technology is in the range of 0.05 to 0.15. Typical applications for this DLC coating are turbo diesel injection parts, piston rings, piston pins and valve train components.
Hydrogen free DLC (a-C and ta-C)
More and more DLC coatings and other low friction coatings will diversify. The combination of the specific component together with the coating and the lubricant is most important to achieve an optimum reduction in friction. To this extend Hauzer offers several solutions, such as ta-C coating, a hydrogen-free carbon coating. The ta-C coating is applied by arc technology. A typical friction coefficient of ta-C is in the range of 0.02 and 0.1. Except ta-C, Hauzer also offers Silicon-doped DLC coating (a-C:H-Si) and sputtered carbon (a-C). Apart from arc technology, a-C can also be produced by HIPIMS technology.