Polycrystalline diamond element comprising ultra-dispersed diamond grain structures and applications utilizing same
View Patent ↗Superabrasive elements, methods of fabricating such elements, and applications utilizing such elements. In one embodiment, a superabrasive element includes a mass of polycrystalline diamond including ultra-dispersed diamond grain structures present in an amount greater than zero weight percent and less than about 75 weight percent of the mass of polycrystalline diamond. Various structures and apparatuses that utilize the superabrasive elements, such as polycrystalline diamond compacts (PDCs) and drill bits are disclosed. Methods of manufacture are also disclosed.
1. A superabrasive element, comprising:
a mass of polycrystalline diamond including ultra-dispersed diamond grain structures present in an amount greater than zero weight percent to about 5 weight percent of the mass of polycrystalline diamond; and
a catalyst material distributed throughout at least a portion of the mass of polycrystalline diamond.
2. The superabrasive element of claim 1 wherein the mass of polycrystalline diamond exhibits a density of at least about 98 percent of theoretical density.
3. The superabrasive element of claim 1 wherein each of the ultra-dispersed diamond grain structures comprises polycrystalline diamond.
4. The superabrasive element of claim 1 wherein the ultra-dispersed diamond grain structures exhibit an average size of about 1 nm to about 50 nm.
5. The superabrasive element of claim 1 wherein the ultra-dispersed diamond grain structures comprise greater than zero weight percent to about 0.1 weight percent of the mass of polycrystalline diamond.
6. The superabrasive element of claim 1 wherein the ultra-dispersed diamond grain structures comprise about 0.1 weight percent to about 0.5 weight percent of the mass of polycrystalline diamond.
7. The superabrasive element of claim 1 wherein the ultra-dispersed diamond grain structures comprise greater than zero weight percent to about 1 weight percent of the mass of polycrystalline diamond.
8. The superabrasive element of claim 1 wherein the ultra-dispersed diamond grain structures comprise greater than zero weight percent to about 2 weight percent of the mass of polycrystalline diamond.
9. The superabrasive element of claim 1 wherein the mass of polycrystalline diamond comprises residual amounts of at least one member selected from the group consisting of amorphous carbon and carbon onion.
10. The superabrasive element of claim 1 wherein a region of the mass of polycrystalline diamond is substantially free of the catalyst material.
11. A superabrasive compact comprising the superabrasive element according to claim 1 bonded to a substrate.
12. A drill bit, comprising:
a bit body adapted to engage a subterranean formation during drilling; and
a plurality of superabrasive cutting elements affixed to the bit body, wherein at least one of the superabrasive cutting elements comprises the superabrasive element according to claim 1 .
13. A polycrystalline diamond compact, comprising:
a substrate; and
a polycrystalline diamond table bonded to the substrate, the polycrystalline diamond table including:
a plurality of micrometer-sized diamond grains distributed substantially throughout the polycrystalline diamond table;
a plurality of ultra-dispersed diamond grain structures interspersed with the plurality of micrometer-sized diamond grains substantially throughout the polycrystalline diamond table, the plurality of ultra-dispersed diamond grain structures being present in the polycrystalline diamond table in an amount of greater than zero weight percent to about 5 weight percent; and
a catalyst material infiltrated into the polycrystalline diamond table from the substrate and distributed substantially throughout the polycrystalline diamond table.
14. The polycrystalline diamond compact of claim 13 wherein the catalyst material comprises a metal-solvent catalyst.
15. The polycrystalline diamond compact of claim 13 wherein the substrate comprises a cemented carbide material.
16. The polycrystalline diamond compact of claim 13 wherein:
the plurality of micrometer-sized diamond grains exhibit an average grain size of about 0.5 μm to about 150 μm; and
the plurality of ultra-dispersed diamond grain structures exhibit an average size of about 1 nm to about 50 nm.
17. The polycrystalline diamond compact of claim 13 wherein the plurality of ultra-dispersed diamond grain structures comprise about 0.1 weight percent to about 0.5 weight percent of the polycrystalline diamond table.
18. The polycrystalline diamond compact of claim 13 wherein the plurality of ultra-dispersed diamond grain structures comprise greater than zero weight percent to about 1 weight percent of the polycrystalline diamond table.
19. The polycrystalline diamond compact of claim 13 wherein the plurality of ultra-dispersed diamond grain structures comprise greater than zero weight percent to about 2 weight percent of the polycrystalline diamond table.