| abstract |
An abrasive bonded at high temperature, comprising: alumina abrasive granules; and a vitreous binder matrix in which the alumina abrasive granules are distributed, the vitreous binder having a curing temperature not less than 1000 ° C, in which the alumina abrasive granules comprise polycrystalline alpha alumina having a fine crystalline microstructure characterized by an average domain size of alpha alumina not exceeding 500 nm, and in which the alumina abrasive granules further comprise a fixing agent, the fixing agent comprising a phase dispersed in the alpha polycrystalline alumina. |