METHOD FOR APPLYING A REFRACTORY CERAMIC COATING TO TITANIUM POWDER Russian patent published in 2022 - IPC B22F1/02 B22F9/16 

FIELD: powder metallurgy.

SUBSTANCE: invention relates to powder metallurgy, in particular to the production of titanium powder with a surface refractory ceramic layer. The resulting powder can be used to work at high temperatures, pressures, deformation rates, aggressive media and wide ranges of friction modes. A mixture containing 60-70 wt. %, of sponge titanium powder with a size of 50-200 microns and 30-40 wt. %, carbon powder is heated in an atmosphere containing at least 60% of nitrogen for at least 3 hours at a temperature of 800-900°C. A surface ceramic layer is formed containing TiN, TiC and TiC_0.2N_0.8 and consisting of two layers, the first of which is adjacent to the surface of the titanium powder, and the second is located on it and has a fine-needle structure.

EFFECT: invention provides increased corrosion resistance, as well as mechanical and tribological properties.

3 cl, 4 dwg, 1 ex