Polycrystalline diamond compact

Patent metadata

Field	Value
Publication number	US-9459236-B2
Application number	US-85890610-A
Country	US
Kind code	B2
Filing date	Aug 18, 2010
Priority date	Oct 3, 2008
Publication date	Oct 4, 2016
Grant date	Oct 4, 2016

Abstract

Embodiments of the invention relate to polycrystalline diamond (“PCD”) exhibiting enhanced diamond-to-diamond bonding. In an embodiment, PCD includes a plurality of diamond grains defining a plurality of interstitial regions. A metal-solvent catalyst occupies at least a portion of the plurality of interstitial regions. The plurality of diamond grains and the metal-solvent catalyst collectively exhibit a coercivity of about 115 Oersteads (“Oe”) or more and a specific magnetic saturation of about 15 Gauss·cm 3 /grams (“G·cm 3 /g”) or less. Other embodiments are directed to polycrystalline diamond compacts (“PDCs”) employing such PCD, methods of forming PCD and PDCs, and various applications for such PCD and PDCs in rotary drill bits, bearing apparatuses, and wire-drawing dies.

First claim

The invention claimed is:

1. A polycrystalline diamond compact, comprising: a polycrystalline diamond table including an upper exterior surface spaced from an interfacial surface, the polycrystalline diamond table being formed in a high-pressure/high-temperature process at a cell pressure of at least 7.5 GPa, at least a portion of the polycrystalline diamond table including: a plurality of diamond grains exhibiting diamond-to-diamond bonding therebetween and defining a plurality of interstitial regions, the plurality of diamond grains exhibits an average grain size of about 30 μm or less; a metal-solvent catalyst occupying at least a portion of the plurality of interstitial regions, the metal-solvent catalyst is present in the at least a portion of the polycrystalline diamond table in an amount of about 7.5 weight % or less; wherein the plurality of diamond grains and the metal-solvent catalyst collectively exhibit a coercivity of about 115 Oersteads (“Oe”) or more; and wherein the plurality of diamond grains and the metal-solvent catalyst collectively exhibit a specific magnetic saturation of about 15 Gauss·cm 3 /grams (“G·cm 3 /g”) or less; wherein the polycrystalline diamond table exhibits a G ratio of at least about 4.0×10 6 ; and a substrate bonded to the interfacial surface of the polycrystalline diamond table; wherein the polycrystalline diamond table is formed from only a single layer of polycrystalline diamond extending from the upper exterior surface to the substrate.

2. The polycrystalline diamond compact of claim 1 wherein the substrate comprises chromium carbide.

3. The polycrystalline diamond compact of claim 1 wherein the polycrystalline diamond table comprises a leached region, and wherein the at least a portion of the polycrystalline diamond table is disposed between the substrate and the leached region.

4. The polycrystalline diamond compact of claim 1 wherein the coercivity of the at least a portion of the polycrystalline diamond table is about 155 Oe to about 175 Oe.

5. The polycrystalline diamond compact of claim 1 wherein the coercivity of the at least a portion of the polycrystalline diamond table is about 115 Oe to about 250 Oe.

6. The polycrystalline diamond compact of claim 1 wherein the coercivity of the at least a portion of the polycrystalline diamond table is about 115 Oe to about 175 Oe.

7. The polycrystalline diamond compact of claim 1 wherein the specific magnetic saturation of the at least a portion of the polycrystalline diamond table is about 5 G·cm 3 /g to about 15 G·cm 3 /g.

8. The polycrystalline diamond compact of claim 1 wherein the specific magnetic saturation of the at least a portion of the polycrystalline diamond table is about 10 G·cm 3 /g to about 15 G·cm 3 /g.

9. The polycrystalline diamond compact of claim 1 wherein the plurality of diamond grains and the metal-solvent catalyst of the at least a portion of the polycrystalline diamond table collectively exhibit a specific permeability less than about 0.10 G·cm 3 /g·Oe.

10. The polycrystalline diamond compact of claim 1 wherein the plurality of diamond grains and the metal-solvent catalyst of the at least a portion of the polycrystalline diamond table collectively exhibit a specific permeability of about 0.060 G·cm 3 /g·Oe to about 0.090 G·cm 3 /g·Oe.

11. The polycrystalline diamond compact of claim 1 wherein the coercivity of the at least a portion of the polycrystalline diamond table is about 130 Oe to about 160 Oe, and the specific magnetic saturation of the at least a portion of the polycrystalline diamond table is about 10 G·cm 3 /g to about 15 G·cm 3 /g.

12. The polycrystalline diamond compact of claim 1 wherein the plurality of diamond grains of the at least a portion of the polycrystalline diamond table exhibits an average grain size of about 20 μm or less.

13. The polycrystalline diamond compact of claim 1 wherein the metal-solvent catalyst comprises cobalt, iron, nickel, or alloys thereof.

14. The polycrystalline diamond compact of claim 1 wherein the amount of the metal-solvent catalyst is about 3 weight % to about 7.5 weight %.

15. The polycrystalline diamond compact of claim 1 wherein the amount of the metal-solvent catalyst is about 1 weight % to about 3 weight %.

16. The polycrystalline diamond compact of claim 1 wherein the polycrystalline diamond table exhibits a residual principal stress on a working surface thereof of about −345 MPa to about 0 MPa.

17. The polycrystalline diamond compact of claim 1 wherein the plurality of diamond grains and the metal-solvent catalyst of the polycrystalline diamond table define a volume of at least about 0.050 cm 3 .

18. The polycrystalline diamond compact of claim 1 wherein the plurality of diamond grains and the metal-solvent catalyst of the polycrystalline diamond table define a volume of about 0.25 cm 3 to about 1.75 cm 3 .

19. The polycrystalline diamond compact of claim 1 wherein the polycrystalline diamond table exhibits a G ratio of at least about 30×10 6 .

20. The polycrystalline diamond compact of claim 1 wherein the polycrystalline diamond table exhibits a G ratio of about 8.0×10 6 to about 15.0×10 6 .

21. The polycrystalline diamond compact of claim 1 wherein the polycrystalline diamond table exhibits a thermal stability, as determined by a distance cut, prior to failure, in a vertical lathe test of at least about 1300 m.

22. The polycrystalline diamond compact of claim 1 wherein the metal-solvent catalyst of the at least a portion of the polycrystalline diamond table comprises at least about 50 weight % cobalt.

23. The polycrystalline diamond compact of claim 1 wherein the metal-solvent catalyst of the at least a portion of the polycrystalline diamond table exhibits a specific magnetic saturation of about 185 G·cm 3 /g to about 215 G·cm 3 /g.

24. The polycrystalline diamond compact of claim 1 wherein the substrate comprises the metal-solvent catalyst, and the metal-solvent catalyst present in the polycrystalline diamond table is infiltrated into the polycrystalline diamond table from the substrate.

25. The polycrystalline diamond compact of claim 1 wherein the polycrystalline diamond table exhibits one or more characteristics of being formed in a high-pressure/high-temperature process at a temperature of at least about 1400° C.

26. A polycrystalline diamond compact, comprising: a substrate including a metal-solvent catalyst therein; and a polycrystalline diamond table bonded to the substrate, the polycrystalline diamond table including an upper exterior surface spaced from an interfacial surface that is bonded to the substrate, the polycrystalline diamond table being formed in a high-pressure/high-temperature process at a cell pressure of at least 7.5 GPa, the polycrystalline diamond table being formed from only a single layer of polycrystalline diamond extending from the upper exterior surface to the substrate, at least a portion of the polycrystalline diamond table including:
a plurality of diamond grains exhibiting diamond-to-diamond bonding therebetween and defining a plurality of interstitial regions, the plurality of diamond grains exhibits an average grain size of about 20 μm or less;
a portion of the metal-solvent catalyst occupying at least a portion of the plurality of interstitial regions, the metal-solvent catalyst present in the at least a portion of the polycrystalline diamond table in an amount of about 1 weight %

Assignees

• Bertagnolli Kenneth E
• Qian Jiang
• Wiggins Jason
• Vail Michael A
• Mukhopadhyay Debkumar
• Us Synthetic Corp

Inventors

• Bertagnolli Kenneth E
• Qian Jiang
• Wiggins Jason
• Vail Michael A
• Mukhopadhyay Debkumar

Classifications

• G01N27/80

  for investigating mechanical hardness, e.g. by investigating saturation or remanence of ferromagnetic material · CPC title

• C04B37/001 Primary

  directly with other burned ceramic articles · CPC title

• F16C2240/40

  Linear dimensions, e.g. length, radius, thickness, gap · CPC title

• F16C17/04

  for axial load only · CPC title

• Y10T428/25

  Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles · CPC title