Abrasive alumina-zirconia grains for polishing and grinding operations contain an alumina-zirconia eutectic mixture with nitrogen mainly present as zirconium nitride

摘要

Abrasive alumina-zirconia grains contain more than 50% by weight of an alumina-zirconia eutectic mixture, with 0.3 to 3% of nitrogen. The zirconia crystals are more than 75% in the cubic form. An Independent claim is also included for a method for the fabrication of these abrasive grains by melting a mixture of alumina and baddeleyite in an electric arc furnace, and adding a nitride material consisting of aluminum nitride and/or one or more aluminum oxynitrides.