Randomly-oriented polycrystalline silicon carbide coatings for abrasive grains

Abstract From the Canadian patent

Disclosed is a composite abrasive particle comprising a core abrasive crystal and a silicon carbide coating inherently bonded to substantially all of the exterior surfaces of said core crystal said silicon, carbide coating characterized by silicon carbide crystals having a random orientation substantially independent of the structure of the core crystal the, outer surface of the coating being conformationally irregular. Aggregates of the composite abrasive particles are interconnected by a matrix of silicon carbide which has an open structure. Preferred core abrasive crystals are diamond or cubic boron nitride. The composite abrasive particles preferably are made by infiltrating core …