Abrasive articles and methods of forming same

Patent metadata

Field	Value
Publication number	US-11926019-B2
Application number	US-202017132421-A
Country	US
Kind code	B2
Filing date	Dec 23, 2020
Priority date	Dec 27, 2019
Publication date	Mar 12, 2024
Grant date	Mar 12, 2024

Abstract

A coated abrasive article includes a substrate and a plurality of abrasive particles overlying the substrate, and the plurality of abrasive particles including tapered abrasive particles having a taper fraction standard deviation of at least 0.025 and not greater than 0.090.

First claim

What is claimed is:

1. A coated abrasive article comprising:
a substrate; and
a plurality of abrasive particles overlying the substrate, wherein the plurality of abrasive particles comprises tapered abrasive particles having a taper fraction standard deviation of at least 0.025 and not greater than 0.090;
wherein each of the tapered abrasive particles comprises a body including a tip region including a tip of the body, a base region including a base of the body, wherein the base region is at an opposite end of the body from the tip region along a length of the body; and
wherein the base comprises a base surface having a plurality of peaks, wherein at least one peak of the plurality of peaks has a tip radius less than a tip radius of the tip of the body.

2. The coated abrasive article of claim 1 , wherein at least 5% of the abrasive particles are tapered abrasive particles.

3. The coated abrasive article of claim 1 , wherein each of the tapered abrasive particles comprises a body having a length, a width, and a thickness, wherein length>width≥thickness.

4. The coated abrasive article of claim 3 , wherein the tapered abrasive particles have a primary aspect ratio (length/width) of at least 1.1.

5. The coated abrasive article of claim 3 , wherein the tapered abrasive particles have a secondary aspect ratio (length/thickness) of at least 1.1.

6. The plurality of abrasive particles of claim 1 , wherein each of the abrasive particles of the plurality of abrasive particles comprises a body having a length, a width, and a thickness, wherein length>width≥thickness.

7. The coated abrasive article of claim 6 , wherein the plurality of abrasive particles have a primary batch aspect ratio [B(length/width)] of at least 1.1.

8. The coated abrasive article of claim 6 , wherein the plurality of abrasive particles comprise a primary batch aspect ratio standard deviation [STDEV-B(length/width)] of not greater than 0.55.

9. The coated abrasive article of claim 1 , wherein the tip region is defined by a taper including a reduction in the width or thickness of the body over a tip region length.

10. The coated abrasive article of claim 1 , wherein the tip region comprises an asymmetric taper including a first surface and a second surface, wherein the first surface has a different contour as compared to the second surface.

11. The coated abrasive article of claim 1 , wherein the base comprises a base surface including peaks and valleys.

12. The coated abrasive article of claim 1 , further comprising an elongated region extending between the tip region and the base region.

13. The coated abrasive article of claim 12 , wherein the elongated region defines a region having a change in width or thickness of not greater than 10% over the length of the elongated region.

14. The coated abrasive article of claim 1 , wherein the tapered abrasive particles comprise an average solidity of at least 0.87.

15. The coated abrasive article of claim 1 , wherein the plurality of abrasive particles have a predetermined lateral position, a predetermined longitudinal position, a predetermined radial position, a predetermined rotational orientation, a predetermined tilt angle, or any combination thereof.

16. A coated abrasive article comprising:
a substrate; and
a plurality of abrasive particles, each of the abrasive particles of the plurality of abrasive particles having a body including a length, width and thickness, wherein the plurality of abrasive particles have an average primary batch aspect ratio [B(length/width)] within a range of at least 2.1 to not greater than 4.7 and a primary batch aspect ratio standard deviation [STDEV-B(length/width)] of at least 0.05 and not greater than 0.55;
wherein the plurality of abrasive particles includes tapered abrasive particles, each of the tapered abrasive particles comprises body including a tip region including a tip of the body, a base region including a base of the body, wherein the base region is at an opposite end of the body from the tip region along a length of the body; and
wherein the base comprises a projection extending from the body, wherein the projection extends at an angle relative to a longitudinal axis of the body, wherein the base region includes a base angle of at least 91 degrees and not greater than 180 degrees.

Assignees

• Saint Gobain Ceramics

Inventors

• Marlin Samuel S
• Bauer Ralph
• Vujcic Stefan
• Rehrig Paul W
• Auscher Marie-Camille
• Everts Darrell K
• Fan Hua
• Iyengar Sujatha K
• Arcona Christopher
• Martone Anthony
• Tanikella Brahmanandam V

Classifications

• B24D3/007

  the constituent being used as bonding agent between different parts of an abrasive tool · CPC title

• B24D3/04

  and being essentially inorganic · CPC title

• B24D3/342 Primary

  incorporated in the bonding agent · CPC title

• B24D3/00 Primary

  Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents · CPC title

• C09K3/1409

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