Porous abrasive article having ceramic abrasive composites, methods of making, and methods of use
Assignee3M Innovative Properties Company
InventorNegus B. Adefris
Life of this patent
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Abstract
An abrasive article made from a plurality of abrasive composites bonded to form a three dimensional abrasive article. Each abrasive composite includes a plurality of primary abrasive particles bonded together by a first binder matrix to form a shaped or irregular abrasive composite. Present within the abrasive composite is an intra-composite porosity between and among the primary abrasive particles. Inter-composite porosity is present within the abrasive article between and among the abrasive composites. The abrasive article is used to grind glass and other workpiece surfaces to a mirror finish.
Claims16
A shaped, three-dimensional abrasive article comprising:
- (a) a plurality of abrasive composites, the abrasive composites comprising:
- (i) a plurality of primary abrasive particles having an average particle dimension of no greater than about 10 micrometers;
- and
- (ii) a ceramic first binder matrix binding the plurality of abrasive particles to form the abrasive composites;
- wherein the abrasive article has an inter-composite porosity of at least 20% by volume.
A method of making a shaped, three-dimensional abrasive article, comprising:
- (a) providing a plurality of abrasive composites, the abrasive composites comprising:
- (i) a plurality of primary abrasive particles having an average particle dimension of no greater than about 10 micrometers;
- and
- (ii) a ceramic first binder matrix binding the plurality of abrasive particles to form the abrasive composites;
- (b) molding the plurality of abrasive composites to form an abrasive article having a porosity between the abrasive composites of at least 20% by volume.
A method of refining a workpiece surface, comprising:
- (a) providing an abrasive article comprising:
- (i) a plurality of abrasive composites, the abrasive composites comprising:
- (A) a plurality of primary abrasive particles having an average particle dimension of no greater than about 10 micrometers;
- and
- (B) a ceramic first binder matrix binding the plurality of abrasive particles to form the abrasive composites;
- (ii) an inter-composite porosity of at least 20% by volume;
- (b) contacting a workpiece surface with the plurality of abrasive composites;
- and
- (c) moving the abrasive article and workpiece surface in relation to one another.
Dependencies are inferred from the claim text.