Saint-gobain Abrasives Technology Company

Lee A Carman

Wesley A King

Irvin F Havens

The present invention provides a vitrified-bonded abrasive tool wherein the abrasive grit portion comprises a thermally sensitive abrasive grain, such as sintered sol gel microcrystalline alpha alumina abrasive grain or superabrasive grain, and wherein the vitrified bond may be matured by firing at a temperature of about 700 to 1,100 &deg; C. The invention preferably is carried out with sintered sol gel microcrystalline alpha alumina abrasive grain and a phosphorous oxide-containing, alkaliborosilicate vitrified bond composition. In one embodiment, during firing at about 700 to 1,100 &deg; C., the vitrified bond of the invention comprises at least two immiscible, amorphous phases.

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Sutton, MA, United States of America

Lee A Carman