Patent ID: 6475254
Filing Date: 2002-11-05
Classification: B24D,C09K

Abstract:
Coated abrasive particle for use in vitreous bond matrices, which comprises:an abrasive particle coated with between 2 and about 50 coating layers, each coating layer ranging in thickness from between about 0.1 and 50 microns, each layer having the composition: MCXNYBZOW, â€ƒwhere, M represents one or more of Ti, Si, V, Cr, Zr, Nb, Mo, Hf, Ta, W, Re or a rare earth metal, and w, x, y, and z, each range from between 0 and 3; wherein the outermost coating layer has a concentration of oxygen and said concentration of oxygen is higher by a factor of at least about 2 than the layer in direct contact with the abrasive particle.