Composite shaped abrasive particles and method of forming same

• US 9,707,529 B2
• Filed: 12/23/2014
• Issued: 07/18/2017
• Est. Priority Date: 12/23/2014
• Status: Active Grant

• Current Assignee: Saint-Gobain Ceramics & Plastics Incorporated (Compagnie De Saint-Gobain S.A.)
• Original Assignee: Saint-Gobain Ceramics & Plastics Incorporated (Compagnie De Saint-Gobain S.A.)
• Inventors: Josseaux, Frederic
• Primary Examiner(s): MCDONOUGH, JAMES E
• Application Number:
  US14/581,220
• Publication Number:
  US 20160177153A1
• Time in Patent Office: 938 Days
• Field of Search: 51293, 51295, 51307, 51309
• CPC Class Codes: B01J 2/26 on endless conveyor belts
• CPC Class Codes: B24D 11/001 Manufacture of flexible abrasive materials
• CPC Class Codes: B24D 18/0063 by extrusion
• CPC Class Codes: C09K 3/1409 Abrasive particles per se preparation of diamond C01B32/25

Abstract

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

Claims

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 plurality of abrasive particles includes a material having a CTE that is not greater than about 50% different than a CTE of the body of the shaped abrasive particle.

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 group consisting of polygons, ellipsoids, numerals, Greek alphabet characters, Latin alphabet characters, Russian alphabet characters, complex shapes having a combination of polygonal shapes, and a combination thereof.

3. The abrasive particle of claim 1, wherein at least a portion of a side surface is free of the plurality of abrasive particles.

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 plurality of abrasive particles is bonded to at least two major surfaces of the body.

6. The abrasive particle of claim 1, wherein the plurality of abrasive particles covers at least about 50% of the total surface area of the body.

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

8. The abrasive particle of claim 1, wherein the plurality of abrasive particles is selected from the group consisting of crushed grains, irregularly shaped grains, elongated grains, agglomerates, aggregates, and a combination thereof.

9. The abrasive particle of claim 1, wherein the body of the shaped abrasive particle comprises a length>

width>

height, and the plurality of abrasive particles comprises a median particle size (D50), and wherein the median particle size (D50) is not greater than the height of the body of the shaped abrasive particle.

10. The abrasive particle of claim 1, wherein the plurality of abrasive particles comprises at least 10 wt % and not greater than 80 wt % of a total weight of the abrasive particle.

11. The abrasive particle of claim 1, wherein the plurality of abrasive particles is bonded to at least two major surfaces of the body of the shaped abrasive particle, and wherein at least a portion of a side surface is free of the plurality of abrasive particles.

12. The abrasive particle of claim 1, wherein the plurality of abrasive particles is embedded in the at least one surface of the body of the shaped abrasive particle.

13. The abrasive particle of claim 1, wherein the plurality of abrasive particles is bonded to at least two major surfaces of the body of the shaped abrasive particle, wherein at least a portion of a side surface is free of the plurality of abrasive particles, wherein the plurality of abrasive particles is embedded in the at least one surface of the body of the shaped abrasive particle, wherein the body comprises a polygonal two-dimensional shape as viewed in a plane defined by a length and a width of the body, wherein the body comprises alumina, wherein the plurality of abrasive particles has an irregular shape, and wherein the plurality of abrasive particles comprises alumina.

14. An abrasive particle comprising:

a shaped abrasive particle comprising a body; and

a plurality of abrasive particles sinter-bonded to at least one surface of the body of the shaped abrasive particle.

15. The abrasive particle of claim 14, wherein the plurality of abrasive particles include a material having a CTE that is not greater than 50% different than a CTE of the body of the shaped abrasive particle.

16. The abrasive particle of claim 14, wherein at least a portion of a side surface is free of the plurality of abrasive particles.

17. The abrasive particle of claim 14, wherein the plurality of abrasive particles is bonded to at least two major surfaces of the body.

18. The abrasive particle of claim 14, wherein the plurality of abrasive particles is bonded to at least two major surfaces of the body, wherein at least a portion of a side surface is free of the plurality of abrasive particles, wherein the plurality of abrasive particles is embedded in the at least one surface of the body of the shaped abrasive particle, wherein the body comprises a polygonal two-dimensional shape as viewed in a plane defined by a length and a width of the body, wherein the body comprises alumina, wherein the plurality of abrasive particles has an irregular shape, and wherein the plurality of abrasive particles comprises alumina.

19. The abrasive particle of claim 14, wherein the plurality of abrasive particles is bonded to at least two major surfaces of the body, and wherein at least a portion of a side surface is free of the plurality of abrasive particles.

20. The abrasive particle of claim 14, wherein the plurality of abrasive particles cover at least 50% of the total surface area of the body.

21. The abrasive particle of claim 14, 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 group consisting of polygons, ellipsoids, numerals, Greek alphabet characters, Latin alphabet characters, Russian alphabet characters, complex shapes having a combination of polygonal shapes, and a combination thereof.

22. The abrasive particle of claim 14, wherein the plurality of abrasive particles is embedded in the at least one surface of the body of the shaped abrasive particle.

23. The abrasive particle of claim 14, wherein the plurality of abrasive particles is selected from the group consisting of crushed grains, irregularly shaped grains, elongated grains, agglomerates, aggregates, and a combination thereof.

24. The abrasive particle of claim 14, wherein the plurality of abrasive particles comprises at least 10 wt % and not greater than 80 wt % of a total weight of the abrasive particle.