Abrasive particles having complex shapes and methods of forming same

Patent metadata

Field	Value
Publication number	US-2018002584-A1
Application number	US-201715681796-A
Country	US
Kind code	A1
Filing date	Aug 21, 2017
Priority date	Jan 10, 2012
Publication date	Jan 4, 2018
Grant date	—

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:
a body having a central portion; at least four radial arms extending outwardly from the central portion along the length of the central portion and wherein the radial arms are triangular.

2 . The shaped abrasive particle of claim 1 , further comprising a fifth radial arm extending outwardly from the central portion along the length of the central portion.

3 . The shaped abrasive particle of claim 2 , further comprising a sixth radial arm extending outwardly from the central portion along the length of the central portion.

4 . The shaped abrasive particle of claim 1 , wherein the radial arms are equally spaced around the central portion.

5 . The shaped abrasive particle of claim 4 , wherein the central portion and the radial arms define a star shaped first end face and a star shaped second end face.

6 . The shaped abrasive particle of claim 1 , wherein the body is an extruded body.

7 . The shaped abrasive particle of claim 1 , wherein the body comprises a length (l), a height (h), and a width (w), a base surface end and an upper surface and a side surface extending between the base surface and the upper surface and wherein the body comprises a primary aspect ratio defined by the ratio of length:height of at least 2:1.

8 . The shaped abrasive particle of claim 7 , wherein the primary aspect ratio is within a range of about 2:1 to about 10:1.

9 . The shaped abrasive particle of claim 7 , wherein the body is overlying a backing and the length of the body is substantially parallel to a plane of the backing.

10 . The shaped abrasive particle of claim 7 , wherein the side surface comprises a fractured region intersecting at least a portion of an edge defining the base surface.

11 . The shaped abrasive particle of claim 10 , wherein the fractured region defines irregularly shaped protrusions and grooves extending from the base surface.

12 . The shaped abrasive particle of claim 1 , wherein the shaped abrasive article has an upright orientation probability of at least 50%.

13 . The shaped abrasive particle of claim 1 , wherein the body consists essentially of alumina.

14 . The shaped abrasive particle of claim 1 , wherein the body consists essentially of a polycrystalline material.

15 . The shaped abrasive particle of claim 14 , wherein the polycrystalline material comprises abrasive grains.

16 . The shaped abrasive particle of claim 15 , wherein the abrasive grains have an average grain size within a range of at least 0.01 microns and not greater than 0.5 microns.

17 . The shaped abrasive particle of claim 1 , wherein the shaped abrasive particle is part of a batch of particulate material including a first portion including a first type of shaped abrasive particle and a second portion including a second type of shaped abrasive particle, wherein the first and second types of shaped abrasive particles having different two-dimensional shapes.

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

19 . The shaped abrasive particle of claim 18 , wherein the fixed abrasive article comprises a coated abrasive article or a bonded abrasive article.

20 . The shaped abrasive particle of claim 1 , wherein the body comprises an opening extending into the interior of the body.

Assignees

• Saint-Gobain Ceram & Plastics Inc

Inventors

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

Classifications

• C09K3/1427

  obtained by division of a mass agglomerated by melting, at least partially, e.g. with a binder · CPC title

• C09K3/1409 Primary

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

• Y10T428/2982

  Particulate matter [e.g., sphere, flake, etc.] · CPC title

• C09K3/1418 Primary

  obtained by division of a mass agglomerated by sintering · 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