Fused Al2O3-Y2O3 eutectic abrasive particles, abrasive articles, and methods of making and using the same
Assignee3M Innovative Properties Company
InventorsAnatoly Z. Rosenflanz, Ahmet Celikkaya, Donna W. Bange
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Abstract
Fused abrasive particles comprising eutectic material. The fused abrasive particles can be incorporated into abrasive products such as coated abrasives, bonded abrasives, non-woven abrasives, and abrasive brushes.
Claims43
A plurality of abrasive particles having an abrasive industry specified nominal grade, said plurality of abrasive particle having a particle size distribution ranging from fine to coarse, wherein at least a portion of said abrasive particles is a plurality of fused, crystalline abrasive particles, said fused abrasive particles comprising at least 20 percent by volume, based on the total metal oxide volume of the respective particle, eutectic material, wherein said eutectic material comprises eutectic of at least two of (a) crystalline Al2O3, (b) crystalline Y2O3, (c) a first crystalline, complex Al2O3.Y2O3, or (d) a second, different, crystalline complex Al2O3.Y2O3.
A method for making fused, crystalline abrasive particles comprising at least 20 percent by volume, based on the total volume of the respective particle, eutectic material, wherein said eutectic material comprises eutectic of at least two of (a) crystalline Al2O3, (b) crystalline Y2O3, (c) a first crystalline, complex Al2O3.Y2O3, or (d) a second, different, crystalline complex Al2O3.Y2O3, said method comprising:
- melting at least one Al2O3 source and at least one Y2O3 source to provide a melt;
- converting the melt to said fused, crystalline abrasive particles;
- and
- grading said fused, crystalline abrasive particles to provide a plurality of abrasive particles having an abrasive industry specified nominal grade, said plurality of abrasive particles having a particle size distribution ranging from fine to coarse, wherein at least a portion of said plurality of abrasive particles is a plurality of said fused, crystalline abrasive particles.
Dependencies are inferred from the claim text.