General Electric Company

Barbara R Sweeting

Francis R Corrigan

Frank Raymond Corrigan

Sam Anthony

Samuel A Anthony, Iii

The present invention provides cubic boron nitride abrasives with individual grains of a larger grain size and higher aspect ratios when compared to conventional polycrystalline CBN. These CBN abrasives are obtained from large particle ideal structure hexagonal boron nitride particles of a size 10-1000 .mu.m. These CBN abrasives can be used as particulates or as a compact mass and give improved wear performance over abrasive tools made with conventional CBN abrasives at reduced specific grinding energies.

Polycrystalline cubic boron nitride abrasive particles and abrasive

The present invention provides methods for forming cubic boron nitride from large particle ideal structure hexagonal boron nitride. Large particles provide improved packing density within the high pressure, high temperature equipment utilized, providing higher yields from conversion processes which utilize a catalyst and those which do not. This large particle ideal structure HBN can be used with conventional high pressure, high temperature processes to provide CBN particulates, composites and compacts.

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Powell, OH, United States of America

Barbara R Sweeting