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US 8,986,409 B2Granted
Abrasive articles including abrasive particles of silicon nitride
AssigneeSaint-Gobain Ceramics & Plastics, Inc.
InventorsGuan Wang, Vimal K. Pujari, Yves Boussant-Roux
Life of this patent
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Abstract
An abrasive article includes a body having abrasive particles contained within a bond material. The abrasive particles can include a majority content of silicon nitride and a minority content of sintering material including at least two rare-earth oxide materials. In an embodiment, the rare-earth oxide materials can include Nd2O3 and Y2O3. In a particular embodiment, the abrasive particles comprise a content (wt %) of Nd2O3 that is greater than a content of Y2O3 (wt %).
Claims20
An abrasive article comprising:
- a body comprising abrasive particles contained within a bond material, each of the abrasive particles comprising (i) a majority content of silicon nitride;
- and (ii) a minority content of sintering material including Nd2O3 and Y2O3, wherein each of the abrasive particles comprises a content (wt %) of Nd2O3 greater than a content of Y2O3 (wt %), and wherein the body comprises no greater than about 5 vol % porosity.
An abrasive article comprising:
- a body comprising abrasive particles contained within a bond material, the abrasive particles comprising a majority content of silicon nitride and a minority content of sintering material including Nd2O3 and Y2O3, wherein the abrasive particles comprise a content (wt %) of Nd2O3 greater than a content of Y2O3 (wt %), and wherein the abrasive particles comprise a total content of rare earth oxide greater than a content of alumina.
An abrasive article comprising:
- a body comprising abrasive particles contained within a bond material, the abrasive particles comprising a majority content (>50 wt %) of beta-phase silicon nitride and a minority content of sintering material including Nd2O3 and Y2O3, wherein the abrasive particles comprise a content (wt %) of Nd2O3 greater than a content of Y2O3 (wt %).
Dependencies are inferred from the claim text.