Shaped abrasive particles and method of forming same

Patent metadata

Field	Value
Publication number	US-9914864-B2
Application number	US-201514757688-A
Country	US
Kind code	B2
Filing date	Dec 23, 2015
Priority date	Dec 23, 2014
Publication date	Mar 13, 2018
Grant date	Mar 13, 2018

Abstract

An abrasive particle including a shaped abrasive particle including a body having a plurality of abrasive particles bonded to at least one surface of the body of the shaped abrasive particle.

First claim

What is claimed is:

1. An abrasive particle comprising:
a shaped abrasive particle comprising a body; and
a plurality of abrasive particles bonded to at least one surface of the body of the shaped abrasive particle,
wherein the body of the shaped abrasive particle comprises a length>width>height, and the plurality of abrasive particles comprise a median particle size (D 50 ), and wherein the median particle size (D 50 ) is at least 0.1% and not greater than about 20% of the length of the body, at least 0.1% and not greater than about 20% of the width of the body, and at least 0.1% and not greater than about 20% of the height of the body.

2. The abrasive particle of claim 1 , wherein the body of the shaped abrasive particle comprises a two-dimensional shape as viewed in a plane defined by a length and a width of the body selected from the first group consisting of regular polygons, irregular polygons, ellipsoids, numerals, Greek alphabet characters, Latin alphabet characters, Russian alphabet characters, complex shapes having a combination of polygonal shapes, a shape with linear and curved portions, and a combination thereof.

3. The abrasive particle of claim 1 , wherein the plurality of abrasive particles is bonded to a major surface of the body.

4. The abrasive particle of claim 1 , wherein the plurality of abrasive particles is bonded to at least two surfaces of the body.

5. The abrasive particle of claim 1 , wherein the body includes a first major surface, a second major surface, and a side surface extending between the first major surface and the second major surface, wherein the plurality of abrasive particles is bonded to the first major surface and the side surface is essentially free of abrasive particles of the plurality of abrasive particles.

6. The abrasive particle of claim 1 , wherein a portion of the abrasive particles of the plurality of abrasive particles is embedded within the at least one surface of the body.

7. The abrasive particle of claim 1 , wherein a portion of the abrasive particles of the plurality of abrasive particles is bonded directly to the at least one surface of the body.

8. The abrasive particle of claim 1 , wherein a portion of the abrasive particles of the plurality of abrasive particles are sinter-bonded to the at least one surface of the body of the shaped abrasive particle.

9. The abrasive particle of claim 1 , wherein the plurality of abrasive particles are selected from the group consisting of oxides, carbides, nitrides, borides, oxycarbides, oxynitrides, oxyborides, natural minerals, synthetic materials, carbon-based materials, and a combination thereof.

10. The abrasive particle of claim 1 , wherein the plurality of abrasive particles comprise a median particle size (D 50 ) of at 0.1 microns and not greater than 80 microns.

11. The abrasive particle of claim 1 , wherein the surface of the body including the plurality of abrasive particle comprises a random arrangement of the plurality of abrasive particles on a major surface of the body, and wherein a side surface of the body is essentially free of the plurality of abrasive particles.

12. The abrasive particle of claim 1 , wherein the abrasive particle is incorporated into a fixed abrasive article.

13. The abrasive particle of claim 1 , wherein the shaped abrasive particle comprises alpha alumina.

14. The abrasive particle of claim 1 , wherein the shaped abrasive particle is essentially free of a binder.

15. The abrasive particle of claim 12 , wherein the abrasive particle has a controlled orientation relative to one or more references axes within the fixed abrasive article.

16. The abrasive particle of claim 12 , wherein the fixed abrasive article is a coated abrasive article and wherein the abrasive particle has a predetermined orientation relative to a backing of the coated abrasive article.

17. The abrasive particle of claim 16 , wherein the at least one surface of the body has a controlled orientation relative to at least one of a longitudinal axis and a lateral axis of the backing.

18. The abrasive particle of claim 17 , wherein the at least one surface of the body is oriented substantially perpendicular to the longitudinal axis and substantially parallel to the lateral axis.

19. The abrasive particle of claim 17 , wherein the at least one surface of the body is oriented substantially parallel to the longitudinal axis and substantially perpendicular to the lateral axis.

20. An abrasive particle comprising:
a shaped abrasive particle comprising a body; and
a plurality of abrasive particles bonded to at least one surface of the body of the shaped abrasive particle,
wherein the shaped abrasive particle comprises alpha alumina.

21. The abrasive particle of claim 20 , wherein the body includes a first major surface, a second major surface, and a side surface extending between the first major surface and the second major surface, wherein the plurality of abrasive particles is sinter-bonded to the first major surface and the side surface is essentially free of the plurality of abrasive particles.

22. An abrasive particle comprising:
a shaped abrasive particle comprising a body; and
a plurality of abrasive particles bonded to at least one surface of the body of the shaped abrasive particle,
wherein the abrasive particle is incorporated into a fixed abrasive article, and
wherein the abrasive particle has a controlled orientation relative to one or more references axes within the fixed abrasive article.

23. The abrasive particle of claim 22 , wherein the body includes a first major surface, a second major surface, and a side surface extending between the first major surface and the second major surface, wherein the plurality of abrasive particles is sinter-bonded to the first major surface and the side surface is essentially free of the plurality of abrasive particles.

Assignees

• Saint Gobain Ceramics

Inventors

• Josseaux Frederic
• Louapre David F

Classifications

• C09K3/1409 Primary

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

• B01J2/20

  by expressing the material, e.g. through sieves and fragmenting the extruded length · CPC title

• B01J2/26

  on endless conveyor belts · CPC title