# US 10,500,697 B2 · Abrasive article including agglomerates having silicon carbide and an inorganic bond material

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- Number: US 10,500,697 B2
- Document ID: US10500697B2
- Status: Granted
- Kind: B2
- Application number: 15/866,229
- Filed: 2018-01-09
- Published: 2018-05-17
- Granted: 2019-12-10
- Earliest claimed: 2014-12-01
- Assignees: Saint-Gobain Abrasives, Inc.; Saint-Gobain Abrasifs
- Applicants: Saint-Gobain Abrasives, Inc.; Saint-Gobain Abrasifs
- Inventors: Nilanjan Sarangi; Sandhya Jayaraman Rukmani; Stephen E. Fox; Russell L. Krause
- Web page: https://patentgrep.com/patent/US10500697B2

## CPC

- B24D 3/18: for porous or cellular structure
- B24D: TOOLS FOR GRINDING, BUFFING OR SHARPENING (abrading-bodies specially designed for tumbling apparatus, e.g. abrading-balls B24B31/14; honing tools B24B33/08; lapping tools B24B37/11)

## Abstract

An abrasive article including a body including a bond material having an inorganic material including a ceramic, abrasive agglomerates including silicon carbide contained within the bond material, and a permeability of at least 60.

## Claims

### Claim 1

An abrasive article, comprising a body including:
from 3 vol % to 20 vol % for a total volume of the body of a bond material comprising an inorganic material comprising a ceramic, wherein the bond material comprises:
from 30 wt % to 60 wt % of silica (SiO2) for a total weight of the bond material;
from 0.5 wt % to 15 wt % sodium oxide (Na2O) for the total weight of the bond material;
zircon; and
less than 1 wt % of potassium oxide (K2O) for the total weight of the bond material;
from 25 vol % to 55 vol % abrasive agglomerates for the total volume of the body, wherein the abrasive agglomerates comprise abrasive particles and are contained within the bond material, wherein the abrasive particles consist of silicon carbide abrasive particles;
not greater than 4.5 vol % for the total volume of the body of a ceramic pore former; and
a permeability of at least 60.

### Claim 2 (depends on 1)

The abrasive article of claim 1, wherein the body comprises the permeability of at least 65 to not greater than 300.

### Claim 3 (depends on 1)

The abrasive article of claim 1, wherein the bond material further comprises from 4 wt % to 18 wt % alumina (Al2O3) for the total weight of the bond material, and from 5 wt % to 24 wt % boron oxide (B2O3) for the total weight of the bond material.

### Claim 4 (depends on 1)

The abrasive article of claim 1, wherein the body is free of the ceramic pore former.

### Claim 5 (depends on 1)

The abrasive article of claim 1, wherein the body includes a porosity of at least 40 vol % for the total volume of the body.

### Claim 6 (depends on 1)

The abrasive article of claim 1, wherein the body includes an average pore size of at least 70 microns and a pore size standard deviation of at least 77 microns.

### Claim 7

An abrasive article, comprising a body including:
from 3 vol % to 20 vol % for a total volume of the body of a bond material comprising an inorganic material comprising a ceramic, wherein the bond material comprises:
from 30 wt % to 60 wt % of silica (SiO2) for a total weight of the bond material;
from 5 wt % to 24 wt % boron oxide (B2O3) for the total weight of the bond material;
from 4 wt % to 18 wt % alumina (Al2O3) for the total weight of the bond material for a total weight of the bond material;
from 0.5 wt % to 15 wt % sodium oxide (Na2O) for the total weight of the bond material; and
less than 1 wt % of potassium oxide (K2O) for the total weight of the bond material; and
zircon;
from 25 vol % to 55 vol % for the total volume of the body of abrasive agglomerates contained within the bond material comprising abrasive particles, wherein the abrasive particles consist of silicon carbide abrasive particles;
not greater than 4.5 vol % for the total volume of the body of a ceramic pore former; and
a porosity of at least 40 vol % for the total volume of the body.

### Claim 8 (depends on 7)

The abrasive article of claim 7, wherein the body comprises the porosity of not greater than 75 vol % for a total volume of the body.

### Claim 9 (depends on 7)

The abrasive article of claim 7, wherein the body comprises a median pore size of at least 45 microns.

### Claim 10 (depends on 7)

The abrasive article of claim 7, wherein the body comprises a permeability of at least 60.

### Claim 11 (depends on 7)

The abrasive article of claim 7, wherein the body comprises an abrasive agglomerates content (Caa) and a bond material content (Cbm) as measured in vol % for a total volume of the body, and wherein the body comprises an agglomerates/bond ratio (Cbm/Caa) of at least 2.

### Claim 12

An abrasive article, comprising a body including:
from 3 vol % to 20 vol % for a total volume of the body of a bond material comprising an inorganic material comprising a ceramic, wherein the bond material comprises:
from 30 wt % to 60 wt % of silica (SiO2) for a total weight of the bond material;
from 0.5 wt % to 15 wt % sodium oxide (Na2O) for the total weight of the bond material;
zircon; and
less than 1 wt % for the total weight of the bond material of any alkali metal oxide that is not sodium oxide; and
from 25 vol % to 55 vol % for the total volume of the body of abrasive agglomerates contained within the bond material including abrasive particles, wherein a majority of the abrasive particles comprise silicon carbide abrasive particles;
a porosity of at least 40 vol % for the total volume of the body; and
a permeability of at least 60,
wherein the body is essentially free of a ceramic pore former.

### Claim 13 (depends on 12)

The abrasive article of claim 12, wherein the abrasive particles consist of silicon carbide abrasive particles.

### Claim 14 (depends on 12)

The abrasive article of claim 12, wherein the body further comprises unagglomerated abrasive particles.

### Claim 15 (depends on 14)

The abrasive article of claim 14, wherein the unagglomerated abrasive particles consist of silicon carbide abrasive particles.

### Claim 16 (depends on 12)

The abrasive article of claim 12, wherein the bond material comprises a forming temperature of not greater than about 950° C.