Polycrystalline diamond materials formed from coarse-sized...

E - Fixed Constructions – 21 – B

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E21B 10/46 (2006.01) B01J 3/06 (2006.01) B24D 3/06 (2006.01) C22C 26/00 (2006.01) C30B 29/04 (2006.01) E21B 10/52 (2006.01)

Patent

CA 2354941

PCD materials of this invention comprise diamond crystals that are bonded together with a catalyst/binder material. The PCD material is prepared by combining diamond grains with a catalyst/binder material either as a premixture or by infiltration during sintering. The PCD material comprises 15 percent by volume or less diamond grains sized 20 micrometers or less. The diamond grains are pressurized under elevated temperature conditions to form the desired PCD material. PCD materials of this invention can constitute the exclusive material phase of a PCD construction, or can form one or more material phase in a multi-phase material microstructure, wherein the multiple material phase can be arranged in an ordered/oriented or random fashion. PCD materials of this invention display improved properties of impact and fatigue resistance, and functional toughness, when used in complex wear environments, when compared to conventional PCs materials comprising intentionally added fine-sized diamond grains.

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