This paper discusses results of research concerning the microstructure and scuffing resistance of HVOF sprayed WC- 12Co nanostructured and conventional coatings under dry friction conditions. The observations were carried out by means of a Falex type tester. It was found that HVOF sprayed nanostructured WC-12Co coatings showed the most homogeneous structure, the greatest scuffing resistance and the highest hardness.

This work evaluates the tribological properties of conventional and nanostructured Al 2 O 3 -13TiO 2 coatings obtained by atmospheric plasma spraying. The structure and composition of the composite coatings and powders were analyzed by SEM, TEM, and x-ray diffraction. Nanoindentation and ball-on-disc tests were conducted and surface topography was examined by noncontact 3D profiling. Coating samples of both types were polished and their friction coefficients were measured. The coefficient of friction for nanostructured coatings was 0.51, while that of conventional coatings was 0.62.