VERFAHREN ZUR HERSTELLUNG EINES DIAMANT- BESCHICHTETEN METALLISCHEN GEGENSTANDES UND SOLCHER GEGENSTAND SO HERGESTELLT

摘要

The invention concerns a method for making a metal part coated with a diamond coating, comprising steps which consist in: making a metal substrate (2) comprising a surface to be coated whereof the main constituent is titanium; depositing, in a first step, on the surface to be coated a carbon layer for the diamond to adhere to comprising at least 10 % of graphite and amorphous carbon designed to diffuse partly or completely into the surface to be coated during a second step; depositing, in a second step, the diamond coating (1) on the adhesive layer. The invention is characterised in that the diamond coating is a layer of nanocrystalline diamond (1) obtained from a gas mixture consisting of carbon, oxygen and hydrogen in proportions such that the O/H ratio is higher than 0.5 and the O/C ratio higher than 1.