The structure and functional properties of PVD and CVD coated Al2O3 + ZrO2 oxide tool ceramics

The paper presents investigation results of structure and properties of the coatings deposited with the PVD and CVD techniques on cutting inserts made from the Al2O3 + ZrO2 oxide tool ceramics. The investigation includes the metallographic analysis on the scanning electron microscope and chemical composition, texture and macro-stresses analysis. The investigation includes also analysis of the mechanical and functional properties of the material: substrate hardness tests and microhardness tests of the deposited coatings, surface roughness tests, evaluation of the adhesion of the deposited coatings and cutting properties of the investigated materials.