Process for the formation of carbon coatings

摘要

A workpiece is successively immersed in different plasma atmospheres and subjected to short duration, high voltage, negative electrical potential pulses or constant negative electrical potentials. This action cleans the surface of oxygen atoms, and implants carbon atoms into the surface of the alloy to form carbide compounds while codepositing a carbonaceous layer on the surface. The carbonaceous layer is bombarded and removed before depositing an amorphous hydrogen-containing carbon layer on the surface of the article.