Making abrasive particles with rheology modifiers and partial silane treating for coated abrasive applications | Publication Date: 11.30.16
Summary:
The formation of initial and final particles with desirable shapes and features, and fewer defects, can be improved by modifying the rheology of the gel. In particular, adding starches or other organic materials can improve the viscoelastic behavior of the gel and reduce sticking during removal from tool openings. Then, by partially silane treating the particles after sintering, the orientation of the particles and distribution of the particles on a coated abrasive can be optimized for better grinding performance.
Keywords:
alumina, boehmite, alpha alumina, shaped abrasive particle (SAP), SAPs, precursor shaped abrasive particle, particle, wt %, wt%, weight percent, polygonal, two-dimensional, two dimensional, two-dimensional shape, plane, length, width, polygons, ellipsoids, numerals, Greek alphabet characters, Latin alphabet characters, Russian alphabet characters, complex shapes having a combination of polygonal shapes, triangle, triangular, rectangle, rectangular, quadrilateral, pentagon, hexagon, heptagon, octagon, nonagon, decagon, body, depositing, impregnating, transferring, punching, cutting, pressing, crushing, form, forming, extrude, extruding, applying, pressing, casting, dicing, drying, coating, forcing, sectioning, perforating, water jet, water-jet, blade, radiation, laser, sheet, direction, altering, embossing, rolling, cutting, engraving, patterning, shaping, drying, heating, heat lamp, printing, molding, screen printing, screen-printing, screen, sinter, sintered, surface shaping, curing, reacting, radiating, planarizing, calcining, sintering, sieving, doping, densifying, grinding, finishing, polishing, tool, die, die opening, opening, belt, translate, translated, translating, inorganic, viscosity, solids, solids content, solids loading, liquid, liquid content, ceramic, ceramic powder, gel, sol gel, sol-gel, seeded gel, seeded-gel, alumina particles, shape-stable, mixture, blend, blend of abrasive particles, polycrystalline, crushed, crushed abrasive particle, abrasive grain, average particle size, average grain size, body, green, dishing, flashing, dispersed, uniform, non-uniform, non uniform, distributed, crystalline, grain size, grit size, bonded abrasive, coated abrasive, fixed abrasive, substrate, open-coat, closed-coat, coat density, cavities, mold, dried, water, volatiles, mixture, drying process, rheology, viscoelastic, starch, corn, rice, tapioca, potato, pore, porosity, algae, guar, gum, polysaccharide, protein, soy, polyamide, additive, ammonia, ammonium hydroxide, freeze, freezing, cure, semi-cure, semi-curing, UV, ultraviolet, UV-curable, UV-cure, resin, UV light, UV-based, EB, actinic, radiation, orientation, homogeneous, homogeneity, electrostatic, projection, attract, attraction, behavior, adhere, adherence, silane, silane-coated, coat, coating.
Download >>Abrasive Particles and Method of Forming Same | Publication Date: 11.4.16
Summary:
An abrasive particle comprising a body having at least one microstructural characteristic including an average crystal size of not greater than 6 microns; or a hardness of at least 20 GPa; and wherein the body further comprises 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. An abrasive particle comprising a body having an average crystal size of not greater than 6 microns and a primary deformation amplitude of not greater than 30 percent. A method of making an abrasive particle including forming a mixture including an alpha alumina precursor material a first dopant comprising magnesium and a second dopant comprising yttrium, wherein the content of the second dopant is greater than the first dopant, and sintering the mixture to form an abrasive particle.
Keywords:
alumina, crystal size, hardness, deformation, boehmite, alpha alumina, shaped abrasive particle (SAP), SAP, SAPs, precursor, precursor shaped abrasive particle, particulate, particulate material, dopant, dopant material, first dopant, first dopant material, second dopant, second dopant material, dopant amount, dopant amount difference, deformation, amplitude, time, crystal, crystal size, average crystal size, bonded article, wt %, wt%, weight percent, vol %, vol%, volume, volume percent, central region, upper surface, exterior surface, upper surface dopant, concentration, polygonal, two-dimensional, two dimensional, two-dimensional shape, plane, length, width, polygons, ellipsoids, numerals, Greek alphabet characters, Latin alphabet characters, Russian alphabet characters, complex shapes having a combination of polygonal shapes, triangle, triangular, rectangle, rectangular, quadrilateral, pentagon, hexagon, heptagon, octagon, nonagon, decagon, body, aspect ratio, thickness, midpoint, corner, edge, contour, cross section, cross-section, average, side, angle, first angle, second angle, quadrilateral, corner, texture, bottom surface, side surface, pattern, feature, curve, polymer, oxide, nitride, carbide, boride, oxycarbide, oxynitride, earth, rare earth, rare-earth, hafnium (Hf), zirconium (Zr), niobium (Nb), tantalum (Ta), molybdenum (Mo), vanadium (V), lithium (Li), sodium (Na), potassium (K), magnesium (Mg), calcium (Ca), strontium (Sr), scandium (Sc), yttrium (Y), lanthanum (La), praseodymium (Pr), niobium (Nb), nitrate, chloride, sulfate, phosphate, spraying, dipping, depositing, impregnating, transferring, punching, cutting, pressing, crushing, form, forming, extrude, extruding, applying, pressing, casting, dicing, drying, coating, sectioning, water, direction, rolling, cutting, shaping, drying, printing, screen printing, screen, sinter, sintered, surface shaping, curing, reacting, radiating, planarizing, calcining, sintering, sieving, doping, tool, die, die opening, opening, belt, translated, inorganic, organic, organic material, storage modulus, viscosity, solids, solids content, solids loading, liquid, liquid content, ceramic, ceramic powder, gel, sol gel, sol-gel, seeded gel, seeded-gel, alumina particles, shape-stable, mixture, blend, blend of abrasive particles, polycrystalline, crushed, crushed abrasive particle, abrasive grain, average particle size, average grain size, body, green, dispersed, uniform, non-uniform, non uniform, distributed, crystalline, grain size, grit size, bonded abrasive, coated abrasive, fixed abrasive, substrate, coat density, height, width, diluent particles, diluent, median particle size, solvent, pH, acid, base, nitric acid, sulfuric acid, citric acid, chloric acid, tartaric acid, phosphoric acid, ammonium nitrate, ammonium citrate, cavities, mold, dried, water, volatiles, mixture, drying process, humidity, software, perimeter, aluminum, heating, micron, microscope, polyester, epoxy, axis, orientation, backing, grinding, obtuse, acute, perpendicular, salt, amplitude, boundary, Vickers, Vickers Hot Hardness, fixed, creep, microstructural, cobalt.
Download >>Abrasive Article Including Shaped Abrasive Particles | Publication Date: 11.4.16
Summary:
A shaped abrasive particle comprising a body having a first major surface, a second major surface, and a side surface joined to the first major surface and the second major surface, and wherein the body comprises at least one partial cut extending from the side surface into the interior of the body. A shaped abrasive particle comprising a body having a first major surface, a second major surface, and a side surface joined to the first major surface and the second major surface, and wherein at least one edge defined by the joining of the side surface with the first major surface comprises a depression having a curved contour. A shaped abrasive particle comprising a body having a first major surface, a second major surface, and a side surface joined to the first major surface and the second major surface, and wherein the body comprises a first exterior corner, a second exterior corner, and a third exterior corner, and wherein at least one of the first exterior corner, the second exterior corner, and the third exterior corner comprises a discrete stepped depression.
Keywords:
alumina, boehmite, alpha alumina, shaped abrasive particle (SAP), SAPs, precursor shaped abrasive particle, particulate, particulate material, dopant, dopant material, first dopant, first dopant material, second dopant, second dopant material, dopant amount, dopant amount difference, wt %, wt%, weight percent, vol %, vol%, volume, volume percent, central region, upper surface, exterior surface, upper surface dopant, concentration, polygonal, two-dimensional, two dimensional, two-dimensional shape, plane, length, width, polygons, ellipsoids, numerals, Greek alphabet characters, Latin alphabet characters, Russian alphabet characters, complex shapes having a combination of polygonal shapes, triangle, triangular, rectangle, rectangular, quadrilateral, pentagon, hexagon, heptagon, octagon, nonagon, decagon, body, aspect ratio, thickness, midpoint, corner, edge, contour, cross section, cross-section, average, side, angle, first angle, second angle, quadrilateral, corner truncated, corner-truncated, corner-truncated triangle, corner truncated quadrilateral, texture, bottom surface, side surface, pattern, patterned surface, feature, protrusions, curve, irregularity, regular, polymer, oxide, nitride, carbide, boride, oxycarbide, oxynitride, alkali, alkaline, earth, rare earth, rare-earth, hafnium (Hf), zirconium (Zr), niobium (Nb), tantalum (Ta), molybdenum (Mo), vanadium (V), lithium (Li), sodium (Na), potassium (K), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), scandium (Sc), yttrium (Y), lanthanum (La), cesium (Ce), praseodymium (Pr), niobium (Nb), nitrate, chloride, sulfate, phosphate, spraying, dipping, depositing, impregnating, transferring, punching, cutting, pressing, crushing, form, forming, extrude, extruding, applying, pressing, casting, dicing, drying, coating, forcing, sectioning, perforating, water jet, water-jet, blade, radiation, laser, sheet, direction, altering, embossing, rolling, cutting, engraving, patterning, shaping, drying, printing, screen printing, screen-printing, screen, sinter, sintered, surface shaping, curing, reacting, radiating, planarizing, calcining, sintering, sieving, doping, densifying, tool, die, die opening, opening, belt, translate, translated, translating, inorganic, organic, organic material, storage modulus, elastic modulus, Weibull modulus, viscosity, solids, solids content, solids loading, liquid, liquid content, ceramic, ceramic powder, gel, sol gel, sol-gel, seeded gel, seeded-gel, alumina particles, shape-stable, mixture, blend, blend of abrasive particles, polycrystalline, crushed, crushed abrasive particle, abrasive grain, average particle size, average grain size, body, green, dishing, flashing, dispersed, uniform, non-uniform, non uniform, distributed, crystalline, grain size, grit size, bonded abrasive, coated abrasive, fixed abrasive, substrate, open-coat, closed-coat, coat density, height, width, diluent particles, diluents, median particle size, solvent, pH, acid, base, nitric acid, sulfuric acid, citric acid, chloric acid, tartaric acid, phosphoric acid, ammonium nitrate, ammonium citrate, cavities, mold, dried, water, volatiles, mixture, drying process, humidity, software, perimeter, hertzian, aluminum, ionization, vaporization, ablating, heating, etching, stamping, scoring, micron, microscope, polyester, epoxy, acrylated, depression, axis, orientation, backing, grinding, obtuse, acute, perpendicular, salt.
Download >>Shaped Abrasive Particle Including Dopant Material and Method of Forming Same | Publication Date: 7.13.15
Summary:
A particulate material including a shaped abrasive particle having a body including a length, a width, and a thickness, the body having a central region including the geometric center of the body having a first dopant material present in a center dopant amount (DCc), the body further having an upper surface defined by the dimensions of length and width, the upper surface having a second dopant material present in an upper surface dopant amount (DUSc), the body having a dopant amount difference (ΔDc) between the first dopant amount and the second dopant amount. A method of forming a shaped abrasive particle including extruding a mixture into a form, applying a dopant material to an exterior surface of the form, and forming a precursor shaped abrasive particle from the form. A particulate material including a shaped abrasive particle having a body including a length (l), a width, (w), and a thickness (t), the body including a first exterior surface having a first dopant amount (D1c) of a first dopant material, a second exterior surface spaced apart from the first exterior surface by at least one edge, the second exterior surface having a second dopant amount (D2c) of a second dopant material, and the body having a dopant amount difference (ΔDc) between the first dopant amount and the second dopant amount. A particulate material including a shaped abrasive particle having a body including a length, a width, and a height, the body having an upper surface defined by dimensions of the length and width, the upper surface having a dopant material forming a pattern on the upper surface. A particulate material including a shaped abrasive particle having a body including a length, a width, and a thickness, the body having a central region including the geometric center of the body having a first microstructure, the body further having an upper surface defined by the dimensions of length and width, the upper surface having a second microstructure, the first microstructure being different from the second microstructure.
Keywords:
alumina, boehmite, alpha-alumina, alpha alumina, fused brown alumina, alundum, shaped abrasive particle (SAP), SAPS, SAPs, formed abrasive particle, precursor shaped abrasive particle, particulate, particulate material, dopant, dopant material, first dopant, first dopant material, second dopant, second dopant material, dopant amount, dopant amount difference, wt %, wt%, weight percent, vol %, vol%, volume, volume percent, central region, center dopant amount, geometric center, upper surface, exterior surface, upper surface dopant, concentration, polygonal, two-dimensional, two dimensional, two-dimensional shape, plane, length, width, polygons, ellipsoids, numerals, Greek alphabet characters, Latin alphabet characters, Russian alphabet characters, complex shapes having a combination of polygonal shapes, triangle, triangular, rectangle, rectangular, quadrilateral, pentagon, hexagon, heptagon, octagon, nonagon, decagon, body, aspect ratio, thickness, midpoint, corner, edge, contour, cross section, cross-section, average, long side, short side, angle, first angle, second angle, quadrilateral, corner truncated, corner-truncated, corner-truncated triangle, corner truncated quadrilateral, texture, bottom surface, side surface, pattern, patterned surface, feature, protrusions, grooves, ridges, scales, curve, irregularity, regular, oxide, a nitride, a carbide, a boride, an oxycarbide, oxynitride, alkali, alkaline, earth, rare earth, rare-earth, hafnium (Hf), zirconium (Zr), niobium (Nb), tantalum (Ta), molybdenum (Mo), vanadium (V), lithium (Li), sodium (Na), potassium (K), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), scandium (Sc), yttrium (Y), lanthanum (La), cesium (Ce), praseodymium (Pr), niobium (Nb), nitrate, chloride, sulfate, phosphate, spraying, dipping, depositing, impregnating, transferring, punching, cutting, pressing, crushing, form, forming, extrude, extruding, applying, pressing, forcing, sectioning, perforating, water jet, water-jet, blade, radiation, laser, sheet, direction, altering, embossing, rolling, cutting, engraving, patterning, shaping, drying, printing, screen printing, screen-printing, screen, sinter, sintered, sintering, densifying, tool, die, die opening, opening, belt, translate, translated, translating, exit, exiting, organic, organic material, storage modulus, viscosity, solids, solids content, solids loading, liquid, liquid content, ceramic, ceramic powder, gel, sol gel, sol-gel, seeded gel, seeded-gel, sintered sol gel, sintered sol-gel, seeded sintered, seeded sintered sol gel alumina particles, shape-stable, mixture, blend, blend of abrasive particles, polycrystalline, crushed, crushed abrasive particle, abrasive grain, average particle size, average grain size, body, green body, dishing, flashing, dispersed, uniform, non-uniform, non uniform, distributed, crystalline, grain size, grit size, average grain size, bonded abrasive, coated abrasive, fixed abrasive, substrate, open-coat, closed-coat, particle density, diluent particles, diluents, median particle size, solvent, pH, acid, base, nitric acid, sulfuric acid, citric acid, chloric acid, tartaric acid, phosphoric acid, ammonium nitrate, ammonium citrate, cavities, screen printing, mold, dried, water, volatiles, mixture, drying process, humidity, curing, reacting, radiating, planarizing, calcining, sieving.
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