Ti-Cr-B-N Coatings Prepared by Pulsed Cathodic-Arc Evaporation of Ceramic TiCrB Target produced by SHS

摘要

The method of pulsed cathodic-arc evaporation of composite targets based on self-propagating high-temperature synthesis has been applied for the first time to prepare nanocomposite coatings in the Ti- Cr-B-N system. The influence of the deposition-process parameters on the coating structure and properties has been studied. Structural investigations have been carried out using X-ray diffraction analysis, transmission and scanning electron microscopy, glow-discharge optical-emission spectroscopy, and optical profilo-metry. The coating properties have been determined by nanoindentation and tribological tests. The results of the study show that the coatings mainly consist of highly dispersed fcc phase based on Ti(Cr)N in the form of crystallites 1-2 run in size; in addition, amorphous BNx phase has been found to exist in the coatings. The coatings obtained under optimal conditions have the following parameters: hardness 20-24 GPa, friction coefficient -0.6, and reduced wear about 2 ×10~6 mm~3 N~(-1)m~(-1)