METHOD FOR OBTAINING POWDER FOR MAGNETIC-ABRASIVE PROCESSING Russian patent published in 2021 - IPC B22F9/04 B24D3/06 B24D3/10 C09K3/14 

FIELD: abrasive materials.

SUBSTANCE: invention relates to the production of abrasive materials, in particular diamond magnetic abrasive powders for magnetic abrasive processing. It can be used for grinding and polishing products for various functional purposes in mechanical engineering, optics, microelectronics, and nuclear power. A charge is prepared from a magnetic powder with a particle size distribution of 1.0-400 microns and an abrasive powder in form of a nanostructured impacted diamond powder containing 10-40 vol.% of lonsdaleite, 50-89 vol.% of diamond and 1-10 vol.% of non-diamond carbon, with a specific surface area of 0.5-1.5 m²/g, a grain size of 0.25-600 microns and an impurity content in the form of a non-combustible residue in the range of 1-5 wt.%. The charge is mixed, pressed, sintered and ground simultaneously in a mechanoreactor with an energy intensity of 1-7 W/g for 10-30 minutes to obtain a powder with a particle size distribution of 1-150 microns.

EFFECT: increased operational properties of magnetic abrasive powder.

1 cl, 1 tbl, 4 ex