摘要:
A method of making a bonded abrasive article comprises urging crushed abrasive particles with agitation against the surface of a tool, thereby causing a first portion of crushed abrasive particles to become retained within horizontally-oriented precisely-shaped cavities at predetermined locations with respect to the surface of the tool, and causing a second portion of the crushed abrasive particles to remain as loose particles on the surface of the tool. The loose particles are separated from the tool. The tool is positioned within a mold containing a curable binder material precursor. The crushed abrasive particles retained in the precisely-shaped cavities into the mold are released, and the tool is removed from the mold. The crushed abrasive particles and the curable binder material precursor are shaped and cured to form the bonded abrasive article. A bonded abrasive article preparable by the method is also disclosed.
摘要:
Verfahren (1) zur Herstellung von Schleifmittelteilchen (3, 4, 5, 6, 7, 8), mit den folgenden Verfahrensschritten: i. Bereitstellen eines zumindest Aluminiumhydroxid enthaltenden Ausgangsgemischs (9), welches durch Wärmebehandlung zumindest in Aluminiumoxid überführbar ist, ii. Extrusion des Ausgangsgemischs (9) zu einem Extrudat (10), vorzugsweise in Form eines Strangs (11) mit einem im Wesentlichen kreisförmigen Querschnitt (22) oder eines Bands (21) mit einem im Wesentlichen rechteckigen Querschnitt (37), iii. Spanen des Extrudats (10) mit geometrisch bestimmten Schneiden (13, 14, 15, 16, 17, 18, 19), vorzugsweise Raspeln, in Zwischenteilchen (20) mit einer uneinheitlichen Form und/oder Größe, iv. Wärmebehandlung der Zwischenteilchen (20), wobei die Zwischenteilchen in Schleifmittelteilchen (3, 4, 5, 6, 7, 8), welche Aluminiumoxid enthalten, überführt werden.
摘要:
An abrasive particle includes a body having at least one microstructural characteristic including average crystal size of not greater than 6 microns or a hardness of at least 20 GPa, and wherein the body further has at least one deformation characteristic including a primary deformation amplitude of not greater than 30 percent, a primary deformation time of not greater than 280 minutes, or a secondary deformation characteristic rate of not greater than 6×10−3 percent/minute.
摘要:
The invention relates to a method for producing zirconia-reinforced Al 2 O 3 grains (9, 12), comprising at least the following steps: inductively melting a starting mixture (2) to form a eutectic melt made of alumina and zirconia (102); applying the eutectic melt (4) as a thin layer material (6, 12), the thin layer material (6, 12) being quenched (104, 107); removing the thin layer material (12); wherein here abrasive grains (12) can be formed directly (107) or the thin layer material (6) can be classified when it is broken into abrasive grains (9) (105, 106), wherein the grains (9, 12) are polycrystalline without amorphous glass phases as an alumina matrix having zirconia precipitations (22, 22a) and wherein at least some of the zirconia precipitations (22a) formed in the nanoscale range.
摘要:
Agglomerate abrasive grain is disclosed. The agglomerate abrasive grain can be incorporated into abrasive products such as coated abrasives, bonded abrasives, non-woven abrasives, and abrasive brushes. A method of making agglomerate abrasive grain is also disclosed.
摘要:
A coated abrasive product includes a particulate material containing green, unfired abrasive aggregates having a generally spheroidal or toroidal shape, the aggregates formed from a composition comprising abrasive grit particles and a nanoparticle binder. Free abrasive products, bonded abrasive products, and the particulate material also contain aggregates.
摘要:
Agglomerate abrasive grain is disclosed. The agglomerate abrasive grain can be incorporated into abrasive products such as coated abrasives, bonded abrasives, nonwoven abrasives, and abrasive brushes. A method of making agglomerate abrasive grain is also disclosed.