Abrasive grain, method of making same and abrasive products
AssigneeMinnesota Mining and Manufacturing Company
InventorAhmet Celikkaya
Life of this patent
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Abstract
An abrasive grain having a coating of grinding aid thereon is provided. The abrasive grains can be incorporated into a variety of abrasive products including bonded abrasives, nonwoven abrasives and coated abrasives.
Claims36
An abrasive grain comprising:
- (i) an abrasive particle having an outer surface;
- and
- (ii) grinding aid material bonded to said outer surface via interparticle attraction.
Abrasive grain comprising sintered ceramic particles having an average particle size within the range of about 10 micrometers to about 4,000 micrometers, each particle comprising:
- (i) a sintered alpha alumina-based ceramic core having a surface area;
- (ii) a coating of inorganic particulates autogenously bonded to said alpha alumina-based core;
- said coating covering at least 70% of the surface area of said alpha alumina-based core to provide an outer surface;
- and
- (iii) grinding aid material bonded onto at least a portion of said outer surface via interparticle attraction.
A method for making abrasive grain comprising:
- (i) an abrasive particle having an outer surface;
- and
- (ii) grinding aid material bonded said outer surface via interparticle attraction,
- said method comprising the step of mixing a plurality of abrasive particles with a sufficient amount of a grinding aid material for a time sufficient to provide said abrasive grain.
A method of making ceramic abrasive grain comprising sintered particles having an average particle size within the range of about 10 micrometers to about 4,000 micrometers, each particle comprising:
- (i) a sintered alpha alumina-based ceramic core having a surface area;
- (ii) a coating of inorganic particulates autogenously bonded to said alpha alumina-based core;
- said coating covering at least 70% of the surface area of said alpha alumina-based core to provide an outer surface;
- and
- (iii) grinding aid material bonded onto at least a portion of said outer surface area via interparticle attraction,
- said method comprising the step of mixing a plurality of sintered particles having an average particle size within the range of about 10 micrometers to about 4,000 micrometers, each particle comprising:
- (i) a sintered alpha alumina-based ceramic core having a surface area;
- and
- (ii) a coating of inorganic particulates autogenously bonded to said alpha alumina-based core;
- said coating covering at least 70% of said surface area of said alpha alumina-based core
- with a sufficient amount of grinding aid material for a time sufficient to provide said abrasive grain.
Dependencies are inferred from the claim text.