METHOD OF PREPARING SUPER-HARD COATED ABRASIVE Russian patent published in 2010 - IPC C04B41/87 

FIELD: chemistry.

SUBSTANCE: described is a method of preparing a super-hard coated abrasive, specifically a coated abrasive based on diamond or cubic born nitride (cBN). When realising this method, an inner layer of an element which is capable of (individually or combined with other elements) forming carbides, nitrides or borides is deposited onto the surface(s) of abrasive material at the first stage through a hot coating method. The hot coating method is selected from a group a group comprising a method of depositing from gaseous phase via thermal decomposition of metal halides, a method of chemical deposition from vapour phase and a thermal diffusion coating method. Vanadium, molybdenum, tantalum, indium, zirconium, niobium, tungsten, aluminium, boron and silicon are usually used for depositing the inner layer. Through reactive sputtering using a reactive gas, the inner layer is coated with at least one outer layer made from material selected from a group comprising metal carbides, metal nitrides, metal borides, metal oxides and carbonitrides, boronitrides and borocarbonitrides of metals, for example carbide or nitride of titanium, silicon or aluminium.

EFFECT: improved quality of abrasive.

9 cl, 5 ex