Thermally-stable polycrystalline diamond materials and compacts

Details Thermally-stable polycrystalline diamond materials and compacts Thermally-stable polycrystalline diamond materials and compacts

C - Chemistry, Metallurgy

30

B

C30B 29/04 (2006.01) C01B 31/06 (2006.01) C22C 26/00 (2006.01) C30B 28/00 (2006.01) C30B 33/06 (2006.01) E21B 10/46 (2006.01) E21B 10/56 (2006.01)

Patent

CA 2489187

Thermally-stable polycrystalline diamond materials of this invention comprise a first phase including a plurality of bonded together diamond crystals, and a second phase including a reaction product formed between a binder/catalyst material and a material reactive with the binder/catalyst material. The reaction product is disposed within interstitial regions of the polycrystalline diamond material that exists between the bonded diamond crystals. The first and second phases are formed during a single high pressure/high temperature process condition. The reaction product has a coefficient of thermal expansion that is relatively closer to that of the bonded together diamond crystals than that of the binder/catalyst material, thereby providing an improved degree of thermal stability to the polycrystalline diamond material.

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