Abrasive particles having complex shapes and methods of forming same

Patent metadata

Field	Value
Publication number	US-11142673-B2
Application number	US-201916459044-A
Country	US
Kind code	B2
Filing date	Jul 1, 2019
Priority date	Jan 10, 2012
Publication date	Oct 12, 2021
Grant date	Oct 12, 2021

Abstract

An abrasive grain is disclosed and may include a body. The body may define a length (l), a height (h), and a width (w). In a particular aspect, the length is greater than or equal to the height and the height is greater than or equal to the width. Further, in a particular aspect, the body may include a primary aspect ratio defined by the ratio of length:height of at least about 2:1. The body may also include an upright orientation probability of at least about 50%.

First claim

What is claimed is:

1. A shaped abrasive particle comprising:
an elongated body having a length defining the longest dimension of the elongated body, a width, and a height;
wherein the length is greater than the width and the length is greater than the height;
wherein the elongated body comprises a first end face, a second end face, and a side surface extending between the first end face and the second end face;
wherein the body comprises a twist along a longitudinal axis defining the length of the elongated body; and
wherein the body comprises a polycrystalline material including diamond.

2. The shaped abrasive particle of claim 1 , wherein the twist angle is at least about 2 degrees.

3. The shaped abrasive particle of claim 1 , wherein the shaped abrasive particle is part of a fixed abrasive article.

4. The shaped abrasive particle of claim 1 , wherein the body comprises diamond and an oxide material.

5. The shaped abrasive particle of claim 1 , wherein the first end face and second end face have a polygonal shape.

6. The shaped abrasive particle of claim 5 , wherein the polygonal shape is selected from the group consisting of a triangle, a rectangle, a quadrilateral, a pentagon, a hexagon, a heptagon, an octagon, a nonagon, a decagon, and a combination thereof.

7. The shaped abrasive particle of claim 1 , wherein the body is overlying a backing and comprises an upright orientation probability of at least about 50%.

Assignees

• Saint Gobain Ceramics

Inventors

• Yener Doruk O
• Czerepinski Jennifer H
• Iyengar Sujatha K
• Kavanaugh Michael D
• Brandes Alan J
• Arcona Christopher
• Bauer Ralph
• Boussant-Roux Yves
• Panzarella Tracy H

Classifications

• C09K3/1409 Primary

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

• B23D3/00

  Planing or slotting machines cutting by relative movement of the tool and workpiece in a vertical or inclined straight line · CPC title

• C09G1/02

  containing abrasives or grinding agents {(abrasives as such C09K3/14; polishing of semi-conductors H10P52/40)} · CPC title

• B01J2/26

  on endless conveyor belts · CPC title

• C01F7/442

  in presence of a calcination additive · CPC title