Parts coated with a hydrogenated amorphous carbon coating over an undercoat containing chromium, carbon and silicon

摘要

This application is based on a metal substrate, a non-hydrogenated amorphous ta-C or a-C carbon coating covering the substrate, and chromium (Cr), carbon (C) and silicon (Si), and a metal group. Includes an undercoat placed between the material and the amorphous carbon coating and with the amorphous carbon coating, the undercoat at the interface with the amorphous carbon coating of 0.35-0.60. Includes the ratio of the atomic percent of silicon to the atomic percent of chromium (Si / Cr) and the ratio of the atomic percent of carbon from 2.5 to 3.5 to the atomic percent of silicon (C / Si). Regarding the parts to be.