Single crystal CBN featuring micro-fracturing during grinding

Patent metadata

Field	Value
Publication number	US-9840649-B2
Application number	US-201314027606-A
Country	US
Kind code	B2
Filing date	Sep 16, 2013
Priority date	Sep 29, 2012
Publication date	Dec 12, 2017
Grant date	Dec 12, 2017

Abstract

A superabrasive material and method of making the superabrasive material are provided. The superabrasive material may comprise a superabrasive crystal having an irregular surface. The superabrasive material further comprises a plurality of structure defects within the superabrasive crystal. The plurality of structure defects may cause micro-chipping when used as grinding materials.

First claim

What is claimed is:

1. A superabrasive material comprising:
a plurality of superabrasive crystals, at least 90% of the plurality of crystals having an irregular shape and surface and a layered or laminar structure;
a plurality of structure defects within each the plurality of superabrasive crystals, wherein the plurality of structure defects cause micro-chipping when used as grinding materials;
a d5 post-crushing particle size distribution less than 65% of d50 pre-crushing particle size; and
an ellipse ratio of about 1.25 to about 1.35.

2. The superabrasive material of claim 1 , wherein the plurality of superabrasive crystals are selected from a group of cubic boron nitride, diamond, and diamond composite materials.

3. The superabrasive material of claim 1 , wherein the plurality of structure defects include micro cracks, crystal dislocations, or flaws.

4. The superabrasive material of claim 1 , wherein the plurality of structure defects cause micro-chipping, micro-fracture when the superabrasive materials are used for grinding materials.

5. The superabrasive material of claim 1 , wherein the superabrasive material has toughness index from about 53 to about 62.

6. The superabrasive material of claim 1 , wherein the layered or laminar microstructure aligned substantially parallel to the irregular surface to enable wear or breaking off of layer or laminar microstructure following a layer or laminar structure pattern.

7. A superabrasive material, comprising:
a plurality of superabrasive crystals, at least 90% of the plurality of crystals having an irregular shape and outer surface, wherein each of the superabrasive crystals has a layered or laminar microstructure aligned substantially parallel to the irregular surface to enable wear or breaking off of layer or laminar microstructure following a layered or laminar structure pattern and an ellipse ratio about 1.25 to about 1.35.

8. The superabrasive material of claim 7 , wherein the superabrasive crystals are selected from a group of cubic boron nitride, diamond, and diamond composite materials.

9. The superabrasive material of claim 7 , wherein at least 70% of the superabrasive crystals have structure defects.

10. The superabrasive material of claim 9 , wherein the structure defects include micro cracks or crystal dislocations, or flaws.

11. The superabrasive material of claim 7 , wherein the superabrasive material has toughness index from about 53 to about 62.

12. The superabrasive material of claim 7 , wherein the superabrasive material d5 has post-crushing particle size distribution less than 65% of d50 pre-crushing particle size.

13. The superabrasive material of claim 7 , wherein at least 90% of the superabrasive crystals have structure defects.

Assignees

• Diamond Innovations Inc
• Diamond Innovations Inc

Inventors

• Ji Shuang
• Long Christopher
• Sowers Susanne
• Zhang Kai

Classifications

• C09K3/1409 Primary

  Abrasive particles per se (preparation of diamond C01B32/25) · CPC title

• B01J2203/066

  Boronitrides · CPC title

• B01J2203/062

  Diamond · CPC title

• B01J3/062 Primary

  characterised by the composition of the materials to be processed · CPC title

• B01J2203/068

  Crystal growth · CPC title