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Patent metadata

Field	Value
Publication number	US-9382602-B2
Application number	US-201213599329-A
Country	US
Kind code	B2
Filing date	Aug 30, 2012
Priority date	Sep 1, 2011
Publication date	Jul 5, 2016
Grant date	Jul 5, 2016

Abstract

The present invention relates to tungsten-rhenium coated compounds, materials formed from tungsten-rhenium coated compounds, and to methods of forming the same. In embodiments, tungsten and rhenium are coated on ultra hard material particles to form coated ultra hard material particles, and the coated ultra hard material particles are sintered at high temperature and high pressure.

First claim

What is claimed is:

1. A method of forming a material, comprising:
coating ultra hard material particles with tungsten and rhenium to form coated ultra hard material particles, wherein the tungsten and rhenium are independently coated to form two or more distinct coating layers; and
sintering the coated ultra hard material particles at high temperature and high pressure.

2. The method of claim 1 , wherein the coating is performed by a method selected from the group consisting of chemical vapor deposition, electroless plating, physical vapor deposition, and combinations thereof.

3. The method of claim 1 , wherein the ultra hard material particles are greater than 80% of the volume of the material, and the tungsten and rhenium are together less than 20% of the volume of the material.

4. The method of claim 1 , wherein coating the ultra hard material particles with tungsten and rhenium forms an alloy of tungsten and rhenium.

5. The method of claim 1 , wherein coating the ultra hard material particles with tungsten and rhenium forms a coating, and the coating further comprises boron.

6. The method of claim 1 , wherein coating the ultra hard material particles with tungsten and rhenium forms a coating, and the coating further comprises aluminum.

7. The method of claim 1 , wherein sintering the coated ultra hard material particles comprises forming a chemical bond between the ultra hard material particles and at least one of the tungsten or rhenium.

8. The method of claim 1 , wherein the ultra hard material particles comprise cubic boron nitride.

9. The method of claim 1 , wherein coating the ultra hard material particles with tungsten and rhenium forms a coating, and the ultra hard material particles have a stronger interaction with the coating than that which would result from physically mixing ultra hard material particles, tungsten and rhenium.

10. The method of claim 1 , wherein the temperature is in a range of about 1000° C. to about 2300° C.

11. The method of claim 1 , wherein the pressure is in a range of about 20 kilobars to about 75 kilobars.

12. A method of forming a material, comprising:
partially coating ultra hard material particles with tungsten and rhenium to form partially coated ultra hard material particles having a discontinuous coating; and
sintering the partially coated ultra hard material particles at high temperature and high pressure.

13. The method of claim 12 , wherein the tungsten and rhenium are coated independently.

Assignees

• Bao Yahua
• Horman Scott L
• Smith International

Inventors

• Bao Yahua
• Horman Scott L

Classifications

• C22C26/00 Primary

  Alloys containing diamond {or cubic or wurtzitic boron nitride, fullerenes or carbon nanotubes} · CPC title

• C22C2026/003

  Cubic boron nitrides only · CPC title

• B22F2998/10

  Processes characterised by the sequence of their steps · CPC title

• B32B15/04

  comprising metal as the main or only constituent of a layer, {which is} next to another layer of {the same or of} a {different material (next to a bituminous or tarry layer B32B11/08; next to a water-setting substance layer B32B13/06; next to a glass layer B32B17/061; next to a cellulosic plastic layer B32B23/042)} · CPC title

• Y10T428/31678

  Of metal · CPC title