Akademik Veri Yönetim Sistemi
3rd International Conference on Design, Simulation, Manufacturing - The Innovation Exchange (DSMIE), Kharkiv, Ukrayna, 9 - 12 Haziran 2020, ss.552-561
The elemental and phase compositions, structure, substructure, and mechanical properties of nanocomposite coatings based on a quasibinary system of tungsten and titanium carbides are studied. It was found that as a result of selective sputtering during coating formation, it is enriched with heavy tungsten atoms in comparison with the sputtered target. The content of carbon atoms varies in proportion to the change in the content of titanium atoms in the coating, which is determined by the higher binding energy in the Ti-C system compared to W-C. With a low content of titanium atoms in the coating (up to 7 at.%), a two-phase state is formed in the coating from (Ti, W)C (with an fcc crystal lattice (structural type NaCl) and W2C (with a hexagonal close-packed lattice) phases. Characteristic concentration regions with a certain growth rate of crystallites and the formation of a microstrain state. It has been established that in areas with low concentrations of impurity elements, hardness maxima are detected which are associated with the formation of a two-phase state and the appearance of a predominant orientation of crystallites with the [111] axis perpendicular to the growth plane. The hardness of nanocomposite coatings is significantly higher than the hardness of basic WC and TiC coatings and corresponds to a superhard state with the maximum value (39.1 GPa).