HIGH-TEMPERATURE BINDING ABRASIVE (VERSIONS) AND METHOD OF ITS PRODUCTION Russian patent published in 2011 - IPC B24D3/16 

FIELD: process engineering.

SUBSTANCE: proposed abrasive comprises glassy binding substrate wherein aluminium oxide abrasive particles are distributed. Said glass binder features solidification temperature of not less than 1000°C. Aluminium oxide abrasive particles contain polycrystalline alpha-aluminium oxide with fine microcrystalline structure with mean size of domains not exceeding 500 nm. Aluminium oxide abrasive particles incorporate also pinning-agents representing a phase dispersed in polycrystalline alpha-aluminium oxide. Alpha-aluminium oxide abrasive particles are produced by thermal treatment of alpha-aluminium oxide precursor containing pinning agent at 1350°C. Abrasive particles are mixed with glassy substrate to form the workpiece. The latter is subjected to thermal treatment at solidification temperature not less than 1000°C.

EFFECT: higher hardness of abrasive and rust resistance.

15 cl, 5 ex, 2 tbl