METHOD OF PRODUCING REFRACTORY POWDER INTERMETALLIC COMPOUND CrTa Russian patent published in 2024 - IPC B22F9/18 C22C1/47 C22C27/02 C22C27/06 

FIELD: powder metallurgy.

SUBSTANCE: invention relates to the technology of obtaining powders of refractory intermetallic compound Cr₂Ta, as a basis for making composite alloys intended for operation under conditions of high operating temperatures. Method includes pressing of initial charge from powder mixture of oxides of Cr₂O₃, Ta₂O₅ and calcium hydride CaH₂ to provide concentration of chromium in obtained intermetallic compound at level of 35.3±1.5 wt.%, concentration of tantalum is the rest, note here that initial charge is compacted to achieve density of 1.9–2.5 g/cm³. Obtained compacted mixture is subjected to hydride-calcium synthesis at a temperature of more than 1,200 to 1,300 °C for at least 6 hours in containers from a non-calcium metal. Obtained reaction products are treated with water and then with a solution of hydrochloric acid to obtain a washed powder. Washed powder is dried and classified.

EFFECT: obtaining intermetallic compound Cr₂Ta with content of basic substance close to 100%, reduced power consumption of the process.

2 cl, 9 tbl, 3 ex