abstract |
Disclosed is a high temperature bonded abrasive component, comprising: alumina abrasive grits; and a vitreous bond matrix that bonds individual alumina abrasive grits to each other and in which the alumina abrasive grits are distributed, the vitreous bond matrix having a cure temperature not less than 1000 degrees C, wherein the alumina abrasive grits comprise polycrystalline alpha alumina having a fine crystalline microstructure characterized by an alpha alumina average domain size not greater than 500 nm, and wherein the alumina abrasive grits further comprise a pinning agent having an average particulate size not greater than 1 micron, the pinning agent comprising a dispersed phase in the polycrystalline alpha alumina. |