Wear-resistant, mechanically highly stressed and low-friction boundary coating construction for titanium or the alloys thereof and a method for producing the same

摘要

The invention relates to a wear-resistant, highly stressed and low-friction boundary coating construction for titanium or the alloys thereof which can be advantageously used in order to protect human implants. According to the inventive boundary coating construction the boundary coating is comprised of a 200 to 400 nm thick DLC coating (4), a 5 to 50 nm thick intermediate coating (3) and a 0.3 to 2.0 mm thick gas alloyed coating (2), said gas alloyed coating having a hardness between 600 HV_0.1 and 1,400 HV_0.1. The inventive boundary coating construction is produced by firstly melting the surface of the member which is to be protected. The surface is then gas alloyed and cleaned in an N₂/Ar atmosphere. Subsequently, the intermediate coating is first deposited followed by a depositing of the hard amorphous carbon coating by means of the laser-induced, pulsed vacuum arc (laser-arc) method.