Polycrystalline diamond compact fabricated from surface functionalized diamond particles

Patent metadata

Field	Value
Publication number	US-9815176-B2
Application number	US-201314061341-A
Country	US
Kind code	B2
Filing date	Oct 23, 2013
Priority date	Oct 23, 2013
Publication date	Nov 14, 2017
Grant date	Nov 14, 2017

Abstract

A superabrasive compact and a method of making the superabrasive compact are disclosed. A superabrasive compact may include a plurality of polycrystalline superabrasive particles made of surface functionalized superabrasive particles. The surface functionalized superabrasive particles may have halogens or organic moiety instead of hydrogen.

First claim

The invention claimed is:

1. A method of making a superabrasive compact, comprising:
providing a plurality of monocrystalline diamond particles;
hydrogenating the plurality of monocrystalline diamond particles to form a surface of the plurality of monocrystalline diamond particles that is hydrogen terminated;
halogenating the hydrogenated surface of the plurality of monocrystalline diamond particles in such a way that halogen atoms are bonded to the surface of the monocrystalline diamond particles;
providing a substrate attached to a superabrasive volume formed by the plurality of monocrystalline diamond particles; and
subjecting the substrate and the superabrasive volume to conditions of elevated temperature and pressure suitable for producing the polycrystalline superabrasive compact.

2. The method of the claim 1 , wherein the substrate is cemented tungsten carbide.

3. The method of the claim 1 , further comprising oxidizing the plurality of monocrystalline diamond particles.

4. The method of the claim 1 , further comprising reacting the halogenated diamond surface with a subsequent derivatizing agent to yield a subsequently derivatized diamond surface.

5. The method of the claim 1 , further comprising graphitizing the plurality of monocrystalline diamond particles into graphite.

6. The method of the claim 1 , wherein the halogenating step includes replacing hydrogen terminated diamond with halogen terminated diamond.

7. The method of the claim 1 , wherein hydrogenating comprises heating the diamonds to a temperature in a range from about 700° C. to about 1200° C. in a hydrogen-containing environment.

8. The method of the claim 1 , wherein the hydrogenated surface of the plurality of monocrystalline diamond particles more than 90% hydrogen terminated.

9. The method of the claim 1 , wherein halogenating comprises heating the plurality of monocrystalline diamond particles to a temperature in a range from about 0° C. to about 500° C. in a halogen gas containing environment.

10. The method of the claim 1 , wherein halogenating comprises a photochemical reaction process, the photochemical reaction process including exposing the plurality of monocrystalline diamond particles to ultraviolet radiation in a halogen gas containing environment.

11. The method of the claim 1 , wherein halogenating includes a plasma process, the plasma process including exposing the plurality of monocrystalline diamond particles to a plasma environment containing halogen containing molecules.

Assignees

• Diamond Innovations Inc

Inventors

• Konovalov Valeriy V

Classifications

• B24D99/005

  Segments of abrasive wheels · CPC title

• B24D18/0009 Primary

  using moulds or presses · CPC title

• B24D3/34 Primary

  characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties · CPC title

• C04B2235/427

  Diamond · CPC title

• C04B35/645

  Pressure sintering · CPC title