Abrasive particles useful for making grinding wheels, abrasive papers and cloths, polishing pastes and blasting abrasives, are based on aluminum oxynitride

摘要

Abrasive particles based on aluminum oxynitride (AlON) have an equivalent aluminum nitride (AlN) content of 2.5-7.5 weight percent (wt.%) (measured on a pseudobinary Al2O3-AlN diagram) and have a structure comprising mostly phi' and gamma AlON. An Independent claim is also included for production of the abrasive particles by preparing a powder mixture of aluminum, aluminum nitride and/or aluminum oxynitride; either fusing the mixture or sintering it at 1950-2000 degrees C; and cooling the resulting particles at less than 1 degrees C/minute.