Abrasive particles, abrasive articles, and methods of making and using the same
Assignee3M Innovative Properties Company
InventorsAnatoly Z. Rosenflanz, Ahmet Celikkaya, Thomas J. Anderson
Life of this patent
Estimating the term…
Abstract
Abrasive particles comprising alpha alumina particles and methods of making the same. The abrasive particles can be incorporated into a variety of abrasive articles, including bonded abrasives, coated abrasives, nonwoven abrasives, and abrasive brushes.
Claims26
A plurality of abrasive particles having a specified nominal grade, wherein at least a portion of the plurality of abrasive particles comprise alpha alumina having an average crystal size not greater than 150 nanometers, wherein the abrasive particles of the portion have a density of at least 90 percent of theoretical density.
An abrasive article comprising a binder and a plurality of abrasive particles, wherein at least a portion of the abrasive particles comprise alpha alumina having an average crystal size not greater than 150 nanometers, wherein the abrasive particles of the portion have a density of at least 90 percent of theoretical density.
A method of abrading a surface, the method comprising:
- providing an abrasive article comprising a binder and a plurality of abrasive particles, wherein at least a portion of the abrasive particles comprise alpha alumina having an average crystal size not greater than 150 nanometers, wherein the abrasive particles of the portion have a density of at least 90 percent of theoretical density;
- contacting at least one of the abrasive particles comprising the alpha alumina with a surface of a workpiece;
- and
- moving at least one of the contacted abrasive particles comprising the alpha alumina or the contacted surface to abrade at least a portion of the surface with the contacted abrasive particle comprising the alpha alumina.
A plurality of abrasive particles having a specified nominal grade, wherein at least a portion of the plurality of abrasive particles comprise alpha alumina, wherein at least 90 percent by number of the alpha alumina present in such portion have crystal sizes not greater than 200 nanometers, and wherein the abrasive particles of the portion have a density of at least 90 percent of theoretical density.
An abrasive article comprising a binder and a plurality of abrasive particles, wherein at least a portion of the abrasive particles comprise alpha alumina, wherein at least 90 percent by number of the alpha alumina present in such portion have crystal sizes not greater than 200 nanometers, and wherein the abrasive particles of the portion have a density of at least 90 percent of theoretical density.
A method of abrading a surface, the method comprising:
- providing an abrasive article comprising a binder and a plurality of abrasive particles, wherein at least a portion of the abrasive particles comprise alpha alumina and wherein at least 90 percent by number of the alpha alumina present in such portion have crystal sizes not greater than 200 nanometers, and wherein the abrasive particles of the portion have a density of at least 90 percent of theoretical density;
- contacting at least one of the abrasive particles comprising the alpha alumina with a surface of a workpiece;
- and
- moving at least one of the contacted abrasive particles comprising the alpha alumina or the contacted surface to abrade at least a portion of the surface with the contacted abrasive particle comprising the alpha alumina.
A plurality of abrasive particles having a specified nominal grade, wherein at least a portion of the plurality of abrasive particles comprise a glass-ceramic, the glass-ceramic comprising at least 35 percent by weight Al2O3, based on the total weight of the glass-ceramic of each particle of the portion, and a metal oxide other than Al2O3, wherein at least a portion of the Al2O3 is crystalline, wherein any crystalline phase present in the glass-ceramic comprising Al2O3 has an average crystal size not greater than 150 nanometers, and wherein the abrasive particles of the portion have a density of at least 90 percent of theoretical density.
An abrasive article comprising a binder and a plurality of abrasive particles, wherein at least a portion of the abrasive particles comprise a glass-ceramic, the glass-ceramic comprising at least 35 percent by weight Al2O3, based on the total weight of the glass-ceramic of each particle of the portion, and a metal oxide other than Al2O3, wherein at least a portion of the Al2O3 is crystalline, wherein any crystalline phase present in the glass-ceramic comprising Al2O3 has an average crystal size not greater than 150 nanometers, and wherein the abrasive particles of the portion have a density of at least 90 percent of theoretical density.
A method of abrading a surface, the method comprising:
- providing an abrasive article comprising a binder and a plurality of abrasive particles, wherein at least a portion of the abrasive particles comprise a glass-ceramic, the glass-ceramic comprising at least 35 percent by weight Al2O3, based on the total weight of the glass-ceramic of each particle of the portion, and a metal oxide other than Al2O3, wherein at least a portion of the Al2O3 is crystalline, wherein any crystalline phase present in the glass-ceramic comprising Al2O3 has an average crystal size not greater than 150 nanometers, and wherein the abrasive particles of the portion have a density of at least 90 percent of theoretical density;
- contacting at least one of the abrasive particles comprising the alpha glass-ceramic with a surface of a workpiece;
- and
- moving at least one of the contacted abrasive particles comprising the glass-ceramic or the contacted surface to abrade at least a portion of the surface with the contacted abrasive particle comprising the glass-ceramic.
A plurality of abrasive particles having a specified nominal grade, wherein at least a portion of the plurality of abrasive particles comprise a glass-ceramic, the glass-ceramic comprising at least 35 percent by weight Al2O3, based on the total weight of the glass-ceramic of each particle of the portion, and a metal oxide other than Al2O3, wherein at least a portion of the Al2O3 is crystalline, wherein at least 90 percent by number of any crystalline phase present in the glass-ceramic comprising Al2O3 have crystal sizes not greater than 200 nanometers, and wherein the abrasive particles of the portion have a density of at least 90 percent of theoretical density.
An abrasive article comprising a binder and a plurality of abrasive particles, wherein at least a portion of the abrasive particles comprise a glass-ceramic, the glass-ceramic comprising at least 35 percent by weight Al2O3, based on the total weight of the glass-ceramic of each particle of the portion, and a metal oxide other than Al2O3, wherein at least a portion of the Al2O3 is crystalline, wherein at least 90 percent by number of any crystalline phase present in the glass-ceramic comprising Al2O3 have crystal sizes not greater than 200 nanometers, and wherein the abrasive particles of the portion have a density of at least 90 percent of theoretical density.
A method of abrading a surface, the method comprising:
- providing an abrasive article comprising a binder and a plurality of abrasive particles, wherein at least a portion of the abrasive particles comprise a glass-ceramic, the glass-ceramic comprising at least 35 percent by weight Al2O3, based on the total weight of the glass-ceramic of each particle of the portion, and a metal oxide other than Al2O3, wherein at least a portion of the Al2O3 is crystalline, wherein at least 90 percent by number of any crystalline phase present in the glass-ceramic comprising Al2O3 have crystal sizes not greater than 200 nanometers, and wherein the abrasive particles of the portion have a density of at least 90 percent of theoretical density;
- contacting at least one of the abrasive particles comprising the glass-ceramic with a surface of a workpiece;
- and
- moving at least one of the contacted abrasive particles comprising the glass-ceramic or the contacted surface to abrade at least a portion of the surface with the contacted abrasive particle comprising the glass-ceramic.
Dependencies are inferred from the claim text.