The present disclosure relates to abrasive aggregates comprised of abrasive particles in a vitreous binder composition, and methods of making and using such abrasive aggregates, including in abrasive articles. The abrasive aggregates can include modifier particles. The abrasive aggregates can includ
The present disclosure relates to abrasive aggregates comprised of abrasive particles in a vitreous binder composition, and methods of making and using such abrasive aggregates, including in abrasive articles. The abrasive aggregates can include modifier particles. The abrasive aggregates can include a layer of outer particles on at least a portion of the outer surface of the abrasive aggregate.
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1. An abrasive aggregate comprising: a vitreous binder composition andabrasive particles dispersed in the vitreous binder composition,wherein the abrasive particles are diamonds,wherein the vitreous binder composition has a glass transition temperature (Tg) in a range of 490° C. to 700° C.,wherein t
1. An abrasive aggregate comprising: a vitreous binder composition andabrasive particles dispersed in the vitreous binder composition,wherein the abrasive particles are diamonds,wherein the vitreous binder composition has a glass transition temperature (Tg) in a range of 490° C. to 700° C.,wherein the vitreous binder composition comprises not less than 1 wt % and not greater than 40 wt % of the weight of the abrasive aggregate,wherein the abrasive particles comprise not less than 60 wt % and not greater than 99 wt % of the weight of the abrasive aggregate, andwherein the abrasive aggregate has a loose packed density in a range of not less than 0.5 g/cm3 to not greater than 3.5 g/cm3. 2. The abrasive aggregate of claim 1, further comprising one or more modifier particles dispersed in the vitreous binder composition. 3. The abrasive aggregate of claim 1, further comprising a layer of outer particles disposed on at least a portion of the outer surface of the abrasive aggregate. 4. A method of forming an abrasive aggregate comprising: mixing together a plurality of abrasive particles and a vitreous binder composition to form a mixture;shaping the mixture to form a plurality of abrasive aggregate precursor granules; andsintering the abrasive aggregate precursor granules to form a plurality of abrasive aggregates,wherein the abrasive particles are diamonds,wherein the vitreous binder composition has a glass transition temperature (Tg) in a range of 490° C. to 700° C.,wherein the vitreous binder composition comprises not less than 1 wt % and not greater than 40 wt % of the weight of the abrasive aggregate,wherein the abrasive particles comprise not less than 60 wt % and not greater than 99 wt % of the weight of the abrasive aggregate, andwherein the abrasive aggregate has a loose packed density in a range of not less than 0.5 g/cm3 to not greater than 3.5 g/cm3. 5. The abrasive aggregate of claim 1, wherein the vitreous binder composition comprises not less than 1 wt % and not greater than 15 wt % of the weight of the abrasive aggregate. 6. The abrasive aggregate of claim 5, wherein the abrasive particles comprise not less than 85 wt % and not greater than 99 wt % of the weight of the abrasive aggregate. 7. The aggregate of claim 2, wherein the one or more modifier particles comprise not less than 0.5 wt % and not greater than 15 wt % of the weight of the abrasive aggregate. 8. The abrasive aggregate of claim 1, wherein the abrasive aggregate has a loose packed density in a range of not less than 0.9 g/cm3 to not greater than 1.5 g/cm3. 9. The abrasive aggregate of claim 1, wherein the abrasive aggregate has a porosity in a range of 5% to 85% as measured by mercury porosimetry. 10. The abrasive aggregate of claim 1, wherein the diamonds are in a size range of not less than 1 micron and not greater than 2000 microns. 11. The abrasive aggregate of claim 1, wherein the abrasive aggregate has a size in a range of not less than 2 microns and not greater than 4000 microns. 12. The abrasive aggregate of claim 1, wherein the modifier particles are silicon carbide particles, cerium particles, alumina particles, or a combination thereof. 13. The abrasive aggregate of claim 1, wherein the modifier particles are in a size range of not less than 0.5 microns and not greater than 100 microns. 14. The abrasive aggregate of claim 1, wherein the vitreous binder composition has a sintering temperature (Ts) in a range of 550° C. to 800° C. 15. The abrasive aggregate of claim 1, wherein the vitreous binder composition comprises not less than 1 wt % and not greater than 15 wt % transition metal. 16. The abrasive aggregate of claim 1, wherein the vitreous binder composition comprises about 40 wt % to 65 wt % of acid oxides, about 15 wt % to 30 wt % of amphoteric oxides, and about 15 wt % to 25 wt % combined base oxides and neutral oxides. 17. The abrasive aggregate of claim 3, wherein the ratio of the size of the outer particles to the size of the abrasive aggregate (Sizeouter:SizeAggregate) is in a range of 1:500 to 1:50. 18. A nonwoven abrasive article comprising: a nonwoven web;a binder disposed on the nonwoven web, and a plurality of abrasive aggregates according to claim 1 that are disposed on or in the binder.
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이 특허에 인용된 특허 (9)
Schwabel, Mark G.; Erickson, Dwight D., Agglomerate abrasive grains and methods of making the same.
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