Abrasive article including shaped abrasive particles

• US 10,557,067 B2
• Filed: 04/14/2015
• Issued: 02/11/2020
• Est. Priority Date: 04/14/2014
• Status: Active Grant

• Current Assignee: Saint-Gobain Ceramics & Plastics Incorporated (Compagnie De Saint-Gobain)
• Original Assignee: Saint-Gobain Ceramics & Plastics Incorporated (Compagnie De Saint-Gobain)
• Inventors: Arcona, Christopher, Louapre, David, Marlin, Samuel S., Yener, Doruk O., Czerepinski, Jennifer H., Breder, Kristin, Fremy, Flavien
• Primary Examiner(s): Dunn, Colleen P
• Assistant Examiner(s): Christie, Ross J
• Application Number:
  US14/686,733
• Publication Number:
  US 20150291866A1
• Time in Patent Office: 1,764 Days
• Field of Search: None
• CPC Class Codes: B24D 3/14 ceramic, i.e. vitrified bondings
• CPC Class Codes: C09K 3/1409 Abrasive particles per se preparation of diamond C01B32/25
• CPC Class Codes: C09K 3/1436 Composite particles, e.g. coated particles

Abstract

A shaped abrasive particle including a body comprising a first major surface, a second major surface, and a side surface extending between the first major surface and the second major surface, the body comprising a sharpness-shape-strength factor (3SF) within a range between about 0.7 and about 1.7 and a Shape Index within a range between at least about 0.01 and not greater than about 0.49.

Claims

1. A shaped abrasive particle comprising a body comprising 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 body comprises a two-dimensional shape as viewed in a plane parallel to the first major surface includes a first portion of the side surface having a first curved section between a first linear section and a second linear section, wherein the first linear section terminates at a first external corner of the body and the second linear section terminates at a second external corner of the body, and wherein the first curved section has a first curved section length (Lc1) that is a fraction of a total length of the first portion (Lfp1) of the side surface, further comprising a length factor (Lc1/Lfp1) of not greater than 0.95.

2. The shaped abrasive particle of claim 1, wherein the first curved section has at least two distinct curvatures.

3. The shaped abrasive particle of claim 2, wherein the first linear section comprises a first linear section length (Ll1) and wherein Ll1 is different compared to Lc1.

4. The shaped abrasive particle of claim 3, further comprising a length factor (Ll1/Lc1) of not greater than about 1 and at least about 0.05.

5. The shaped abrasive particle of claim 1, wherein the first curved section and the first linear section define an interior corner defining an obtuse angle.

6. The shaped abrasive particle of claim 1, wherein the first portion of the side surface comprises a first interior corner and a second interior corner, wherein the first interior corner and the second interior corner are spaced apart from each other at opposite ends of the first curved section, wherein the first interior corner is disposed at a first edge between the first linear section and the first curved section, and wherein the second interior corner is disposed at a second edge between the first curved section and the second linear section.

7. The shaped abrasive particle of claim 1, wherein the first curved section defines a concave shape.

8. The shaped abrasive particle of claim 1, wherein the first curved section has a radius of curvature (Rc1) and the body comprises a width (w), and wherein the radius of curvature (Rc1) is at least half the width (w) of the body.

9. The shaped abrasive particle of claim 1, wherein the body comprises a second portion of the side surface separated from the first portion of the side surface by the first external corner of the body, the second portion comprising at least a second curved section, and a third portion of the side surface separated from the first portion of the side surface by the second external corner of the body and further separated from the second portion of the side surface by a third external corner of the body, wherein the third portion comprises at least a third curved section.

10. The shaped abrasive particle of claim 1, wherein the body comprises a first maximum tip width (Wt1) that defines a maximum width of a first arm of the body, and wherein the first maximum tip width (Wt1) is disposed a distance from a first terminal end of the first arm and between a midpoint of the body and the first terminal end.

11. The shaped abrasive particle of claim 10, wherein the body further comprises a first throat width (Wth1) defining a narrowest portion of the first arm between a first maximum tip width location of the first arm and the midpoint of the body, wherein the first throat width (Wth1) defines a first throat width location along an axis of the first arm, wherein the first throat width location is closer to the midpoint than the first maximum tip width location.

12. The shaped abrasive particle of claim 11, wherein the first throat width location defines a first throat length (Lth1) extending between the first throat location and the first maximum tip width location, wherein the first throat length (Lth1) is a fraction of a first arm length (Larm1), wherein the first throat length (Lth1) is at least 0.05×

(Larm1) and not greater than 0.9×

(Larm1).

13. The shaped abrasive particle of claim 12, wherein the first throat width (Wth1) is at least 0.05×

(Wt1) and not greater than 0.95×

(Wt1).

14. The shaped abrasive particle of claim 13, wherein the body further comprises a second throat width (Wth2) defining a narrowest portion of a second arm between a second maximum tip width location of the second arm and the midpoint of the body, wherein the second throat width (Wth2) defines a second throat width location along an axis of the second arm and wherein the second throat width location is closer to the midpoint than is the second maximum tip width location;

and wherein the body further comprises a third throat width (Wth3) defining a narrowest portion of a third arm between a third maximum tip width location of the third arm and the midpoint of the body, wherein the third throat width (Wth3) defines a third throat width location along an axis of the third arm and wherein the third throat width location is closer to the midpoint of the body than is the third maximum tip width location.

15. The shaped abrasive particle of claim 4, wherein the length factor (Ll1/Lc1) is at least 0.2 and not greater than 0.8.

16. The shaped abrasive particle of claim 3, wherein the second linear section comprises a length (Ll2), and wherein Ll1 is substantially equal to Ll2.

17. The shaped abrasive particle of claim 16, wherein the shaped abrasive particle has a linear sum factor ((Ll1+Ll2)/Lc1) of at least 0.05 and not greater than 1.

18. The shaped abrasive particle of claim 1, wherein the first curved section defines an arc having a single distinct curvature.

19. A plurality of shaped abrasive particles, each of the shaped abrasive particles having the features of claim 1, and wherein the plurality of shaped abrasive particles are part of a fixed abrasive article selected from the group consisting of a bonded abrasive article, a coated abrasive article, or a combination thereof.

20. A fixed abrasive article of claim 19, further including a blend of different types of abrasive particles, including a first type including the plurality of shaped abrasive particles and a second type different from the first type based on at least one of size, shape, hardness, fracture toughness, strength, tip sharpness, Shape Index, composition, type and/or content of dopants, or any combination thereof.