Investigation of the structure and properties of coatings deposited on ceramic tool materials

This paper presents the results of the investigation of the structure and properties of the coatings deposited with the PVD and CVD techniques on sintered tool materials: cermets, oxide Al2O3 ceramic and nitride Si3N4 based ceramics. The investigation includes the metallographic analysis using the transmission and Scanning Electron Microscope (SEM), chemical composition analysis, as well as the analysis of the mechanical and functional properties of the material. Tests were carried out on the multipoint inserts made from the ceramic tool materials based on Al2O3 and Si3N4 and cermets, both uncoated and coated with gradient, multicomponent and multilayer hard wear resistant coatings with PVD and CVD processes.