Magnetizable abrasive particles and abrasive articles including them
A magnetizable abrasive particle comprises a ceramic body having an outer surface and a magnetizable layer disposed on a portion, but not the entirety, of the outer surface. The ceramic body comprises a platelet having two opposed major facets connected to each other by a plurality of side facets. The magnetizable layer completely covers one of the two opposed major facets, and the magnetizable layer has a magnetic dipole oriented perpendicular or parallel to the facet which it completely covers. A plurality of the magnetizable abrasive particles, and abrasive articles including them are also disclosed. Methods of making the foregoing are also disclosed.
1. A magnetizable abrasive particle comprising a ceramic body having an outer surface and a magnetizable layer disposed on a portion, but not the entirety, of the outer surface, wherein the ceramic body comprises a platelet having two opposed major facets connected to each other by a plurality of side facets, wherein the magnetizable layer completely covers one of the two opposed major facets, and wherein the magnetizable layer has a magnetic dipole oriented perpendicular to the facet which it completely covers.
2. The magnetizable abrasive particle of claim 1 , wherein the ceramic body comprises a shaped ceramic body.
3. The magnetizable abrasive particle of claim 2 , wherein the shaped ceramic body comprises a precisely-shaped ceramic body.
4. The magnetizable abrasive particle of claim 1 , wherein the magnetizable layer completely covers a single facet.
5. The magnetizable abrasive particle of claim 1 , wherein the platelet is triangular.
6. The magnetizable abrasive particle of claim 1 , wherein the magnetizable layer comprises magnetizable particles disposed in a binder matrix.
7. The magnetizable abrasive particle of claim 6 , wherein the binder matrix comprises an organic binder matrix.
8. A plurality of magnetizable abrasive particles according to claim 1 .
9. An abrasive article comprising a plurality of magnetizable abrasive particles according to claim 1 retained in a binder material.
10. An abrasive article according to claim 9 , wherein the abrasive article comprises a bonded abrasive wheel.
11. An abrasive article according to claim 9 , wherein the abrasive article comprises a coated abrasive article, wherein the coated abrasive article comprises an abrasive layer disposed on a backing, and wherein the abrasive layer comprises the binder material and the plurality of magnetizable abrasive particles.
12. An abrasive article according to claim 9 , wherein the abrasive article comprises a nonwoven abrasive, wherein the nonwoven abrasive comprises a lofty open nonwoven fiber web having an abrasive layer disposed on at least a portion thereof, and wherein the abrasive layer comprises the binder material and the plurality of magnetizable abrasive particles.
13. An abrasive article according to claim 9 , wherein a majority of the magnetizable abrasive particles are aligned parallel to each other.