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US 4,457,767 AGranted
Alumina-zirconia abrasive
AssigneeNorton Company
InventorsSimon Poon, Ronald W. Trischuk
Life of this patent
Estimating the term…
Abstract
Abrasive properties of co-fused alumina zirconia are improved by the addition of from 0.1 to 2% of Y.sub.2 O.sub.3 to the fusion mix and quenching the fused product. Y.sub.2 O.sub.3 ores containing mostly Y.sub.2 O.sub.3 with lesser amounts of rare earth oxides can be substituted for high purity Y.sub.2 O.sub.3.
Claims4
Fused alumina/zirconia near eutectic abrasive grits with 0.1 to 2.0% by weight of yttrium oxide calculated at Y.sub.2 O.sub.3, and having a maximum spacing of zirconia rods of 4,000 Angstroms, as measured at the eutectic cell centers.
Dependencies are inferred from the claim text.