METHOD FOR OBTAINING A BINARY COMPOSITE POWDER FROM METALS OF THE CHROMIUM SUBGROUP Russian patent published in 2022 - IPC B22F9/22 B22F1/00 

FIELD: powder metallurgy.

SUBSTANCE: invention relates to powder metallurgy of refractory metals, and in particular to metallothermal methods for producing dispersed powders of binary composites from metals of the chromium subgroup. It can be used to obtain functional materials operating in aggressive environments at high temperatures. Metallothermal reduction of oxygen compounds of molybdenum, tungsten and chromium is carried out, selected from the group containing: Mo_xW_1-xO₃, Cr_xW_1-xO₄, Cr_xMo_1-xO₂, where 0<х<1 or CrWO₃, Cr₂WO₆, Cr₂MoO₆, Cr₂(MoO₄)₃. The reduction is carried out with magnesium or calcium vapor in an argon and/or helium atmosphere at a temperature of 600-1000°C and a pressure of 5-60 kPa with the formation of a reaction mass in the form of an upper dense layer of magnesium or calcium oxides and a lower layer of a binary composite powder.

EFFECT: increased specific surface area of ​​the resulting binary composite powder while increasing its purity.

2 cl, 1 tbl, 8 ex