FORMATION OF THERMOSTABLE WEAR-RESISTANT COATINGS ON THE SURFACE OF GRAINS OF GRINDING POWDERS FROM A MIXTURE OF SOLUBLE AND INSOLUBLE OXYGEN-, SILICATE- AND CARBIDE-CONTAINING ACTIVATED COMPONENTS

Abstract

The target of the study is to develop the process of liquid-phase application to grinding powders grains of multicomponent combined oxygen-, silicate- and carbid-containing substances (soluble oxides and silicates, insoluble oxides and carbides activated by the mechanochemical method) as a result of which thermostable coatings are formed on the grains of the abrasive.

The basic technology of formation of the combined thermostable wear-resistant coatings on grinding powders (diamond, cBN, composite powders) is developed.

The coating consists of oxygen- (B₂O₃, TiO₂, SiO₂, Al₂O₃, TiO, CaO, ZnO, CeO₂, SnO₂), silicate- (Na₂O(SiO₂)_n), K₂O(SiO₂)_n) and carbide- (SiC, TiC, B₄C) containing compounds in various combinations.

The thermal stability, magnetic and electrophysical characteristics, techno-logical properties of the studied samples of grinding powders - initial and coated
were determined.

The results of using abrasive powders with combined coatings (with a modified grain surface) in a diamond-abrasive tool are presented.