Analyzing the Quality of Grinding and Mixing of Copper and Chromium Powder in a New-Type Mill

Abstract

The possibility of using a new-type mill developed at the Frantsevich Institute for Problems of Materials Science for obtaining copper and chromium powder mixtures for their further use in the manufacture of electrotechnical materials is studied. The mill ensures mechanical grinding of bulk materials by the mechanisms similar to those acting in vortical and jet-type mills. The greater dispersion in this mill is due to the sliding contact in interaction of particles with abrasive surfaces of the working chamber. It is shown that common grinding of electrolytic copper and restored or aluminothermic chromium for 10–30 min in argon contributes to variation in the shape of particles, facilitates their mixing, and assures uniform distribution of components in the mixture.