Polycrystalline compacts having material disposed in interstitial spaces therein, and cutting elements including such compacts
AssigneeBaker Hughes Incorporated
InventorAnthony A. DiGiovanni
Life of this patent
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Abstract
Polycrystalline compacts include smaller and larger hard grains that are interbonded to form a polycrystalline hard material. The larger grains may be at least about 150 times larger than the smaller grains. An interstitial material comprising one or more of a boride, a carbide, a nitride, a metal carbonate, a metal bicarbonate, and a non-catalytic metal may be disposed between the grains. The compacts may be used as cutting elements for earth-boring tools such as drill bits, and may be disposed on a substrate.
Claims17
A polycrystalline compact, comprising:
- a first plurality of grains of hard material having an average grain size of about five hundred nanometers (500 nm) or less;
- a second plurality of grains of hard material having an average grain size of about five microns (5 μm) or greater;
- and
- an interstitial material concentrated around at least some of the first plurality of grains of hard material, the interstitial material comprising at least one of a boride, a carbide, a nitride, a metal carbonate, a metal bicarbonate, and a non-catalytic metal.
A polycrystalline compact, comprising:
- a first plurality of grains of hard material having a first average grain size;
- at least a second plurality of grains of hard material having a second average grain size that is at least about one hundred fifty (150) times larger than the first average grain size, the first plurality of grains and the at least a second plurality of grains being interspersed and interbonded to form a polycrystalline hard material;
- and
- an interstitial material concentrated around at least some grains of the first plurality of grains, the interstitial material comprising at least one of a boride, a carbide, a nitride, a metal carbonate, a metal bicarbonate, and a non-catalytic metal.
A cutting element, comprising:
- a substrate;
- and
- a polycrystalline compact on the substrate, the polycrystalline compact comprising:
- a first plurality of grains of hard material having a first average grain size;
- at least a second plurality of grains of hard material having a second average grain size that is at least one hundred fifty (150) times larger than the first average grain size;
- and
- an interstitial material concentrated around at least some grains of the first plurality of grains, the interstitial material comprising at least one of a boride, a carbide, a nitride, a metal carbonate, a metal bicarbonate, and a non-catalytic metal.
Dependencies are inferred from the claim text.