POLYCRYSTALLINE DIAMOND, METHODS OF FORMING SAME, CUTTING ELEMENTS, AND EARTH-BORING TOOLS

摘要

A method of forming polycrystalline diamond includes providing an alloy over at least portions of a plurality of diamond particles, and subjecting the plurality of diamond particles to a high-temperature, high-pressure process to form a polycrystalline diamond material having inter-granular bonds between adjacent diamond particles. The alloy includes iridium and nickel, and a volume of the diamond particles is at least about 92% of a total volume of the alloy and the diamond particles. The polycrystalline diamond material includes at least about 92% diamond by volume. A polycrystalline diamond compact includes grains of diamond bonded to one another by inter-granular bonds and an alloy disposed within interstitial spaces between the grains of diamond. The grains of diamond occupy at least 94% by volume of the polycrystalline diamond compact. An earth-boring tool may include a bit body and such a polycrystalline diamond compact.

主权项

1. A method of forming polycrystalline diamond, comprising:
providing an alloy over at least portions of a plurality of diamond particles, wherein the alloy comprises iridium and nickel, and wherein a volume of the diamond particles is at least about 92% of a total volume of the alloy and the diamond particles; and subjecting the plurality of diamond particles to a high-temperature, high-pressure process to form a polycrystalline diamond material having inter-granular bonds between adjacent diamond particles, wherein the polycrystalline diamond material comprises at least about 92% diamond by volume.