METHOD FOR PRODUCING POWDER CONTAINING SINGLE-PHASE HIGH-ENTROPY CARBIDE OF COMPOSITION Ti-Nb-Zr-Hf-Ta-C WITH CUBIC LATTICE

摘要

FIELD: chemistry.;SUBSTANCE: invention relates to a method for producing powder containing single-phase high-entropy carbide of the composition Ti-Nb-Zr-Hf-Ta-C with a cubic lattice, it can be used for the production of refractory materials. The powders of titanium oxide TiO₂, niobium oxide Nb₂O₅, zirconium oxide ZrO₂, hafnium oxide HfO₂, tantalum oxide Ta₂O₅ and X-ray amorphous carbon used in an equimolar ratio are mixed in a ball mill for 2 hours. The resulting powder mixture is placed in the cavity of a graphite container in the form of a graphite cup, which is the cathode, exposed to a DC arc discharge in the air in the cathode cavity by contacting the anode in the form of a solid graphite rod with the powder mixture at a current strength of 180-220 A for 25-40 s. The discharge combustion is interrupted by the removal of the anode from the cathode. After the cathode has cooled to room temperature in the air, the resulting powder, including the specks, is extracted from the cathode cavity and ground in an agate mortar to a homogeneous state. The ground powder is placed in the cathode cavity and subjected to the above-mentioned arc discharge for the second time. Then discharge combustion is interrupted. After the cathode has cooled to room temperature in the air, the resulting powder, including the specks, is removed from the cathode cavity and ground in an agate mortar to a homogeneous state. The ground powder is placed in the cathode cavity and subjected to the above-mentioned arc discharge. The discharge combustion is interrupted. After the cathode has cooled to room temperature in the air, the finished product is removed from the cathode cavity. ;EFFECT: powder containing single-phase high-entropy carbide of the Ti-Nb-Zr-Hf-Ta-C composition with a cubic lattice is obtained in an open-air environment and its production time is reduced. ;1 cl, 5 dwg, 1 tbl