3m Innovative Properties Company

Other

Thomas J Anderson

Ahmet Celikkaya

Anatoly Z Rosenflanz

Negus B Adefris

Malte Korten

Brian D Goers

Robert L W Smithson

Carsten Franke

Brian A Shukla

Maiken Givot

Michael C Harper

Elizaveta Y Plotnikov

Berkan K Endres

Thomas J Nelson

Aaron K Nienaber

Joseph B Eckel

Louis S Moren

Mark A Lukowski

Don Vincent West

Hugh C Walker

Naiyong Jing

Ernest L Thurber

Steven J Keipert

Adam D Miller

Taisiya Skorina

Sergei A Manuilov

Frederick A Magadanz

A method of forming a vitreous bond abrasive article is presented that includes receiving, by a manufacturing device having one or more processors, a digital object comprising data specifying a plurality of layers of a vitreous bond abrasive article precursor. The vitreous bond abrasive article precursor includes abrasive particles bonded together by a vitreous bond precursor material and an organic compound. The vitreous bond abrasive article precursor further comprises at least one of: at least one tortuous cooling channel extending at least partially through the vitreous bond abrasive article precursor or at least one arcuate cooling channel extending at least partially through the vitreous bond abrasive article precursor. The method also includes generating, with the manufacturing device by an additive manufacturing process, the vitreous bond abrasive article precursor based on the digital object.

Vitreous bonded abrasive articles and methods of manufacture thereof

Magnetizable abrasive particles are described comprising ceramic particles having outer surfaces comprising a coating of unsintered polyion and magnetic particles bonded to the polyion. In favored embodiments, the magnetic particles have a magnetic saturation of at least 10, 15, 20, 25, 30, 35, 40, 45 or 50 emu/gram. In another embodiment, an abrasive article is described comprising a plurality of magnetizable abrasive particles as described herein retained in a binder material. Also described are method of making magnetizable abrasive particles and methods of making an abrasive article comprising magnetizable abrasive particles.

Magnetizable abrasive particle and method of making the same

The present disclosure provides methods of making a vitreous bond abrasive article and a metal bond abrasive article. An abrasive article preform is produced by an additive manufacturing sub-process comprising the deposition of a layer of loose powder particles in a confined region and selective heating via conduction or irradiation to heat treat an area of the layer of loose powder particles. The loose powder particles include abrasive particles and organic compound particles, as well as vitreous bond precursor particles or metal particles. The abrasive article preform produced by additive manufacturing is subsequently heated to provide the vitreous bond abrasive article comprising the abrasive particles retained in a vitreous bond material, or to provide the metal bond abrasive article. Also, the methods include receiving, by an additive manufacturing device having a processor, a digital object specifying data for an abrasive article, and generating the abrasive article with the manufacturing device.

Methods of making metal bond and vitreous bond abrasive articles, and abrasive article precursors

The present disclosure provides methods of making a vitreous bond abrasive article and a metal bond abrasive article. The methods include sequential steps. Step a) includes a subprocess including sequentially: i) depositing a layer of loose powder particles in a confined region; and ii) selectively applying heat via conduction or irradiation, to heat treat an area of the layer of loose powder particles. The loose powder particles include abrasive particles and organic compound particles, as well as vitreous bond precursor particles or metal particles. The layer of loose powder particles has substantially uniform thickness. Step b) includes independently carrying out step a) a number of times to generate an abrasive article preform comprising the bonded powder particles and remaining loose powder particles. Step c) includes separating remaining loose powder particles from the abrasive article preform. Step d) includes heating the abrasive article preform to provide the vitreous bond abrasive article comprising the abrasive particles retained in a vitreous bond material, or to provide the metal bond abrasive article. A method of making a metal bond abrasive optionally includes infusing an abrasive article preform with a molten lower melting metal and solidifying the molten lower melting metal to provide the metal bond abrasive article. The present disclosure further provides a vitreous bond abrasive article precursor and a metal bond abrasive article precursor.

A method of making magnetizable abrasive particles includes: moistening the outer surfaces of ceramic particles with waterglass to provide moistened ceramic particles. Magnetizable particles are contacted with the moistened ceramic particles to provide powder-coated ceramic particles. The powder-coated ceramic particles are heated to at least a temperature sufficient to bond the magnetizable particles of the powder-coated ceramic particles to the respective ceramic particles thereby providing the magnetizable abrasive particles. On a respective basis, each magnetizable abrasive particle comprises a respective ceramic particle having a magnetizable particles bonded thereto.

A method of making a coated abrasive article includes the steps of: applying a make coat to a first major surface of a backing; applying shaped abrasive particles to the make coat to form a first abrasive layer consisting essentially of shaped abrasive particles; applying diluent particles to the make coat over the shaped abrasive particles to form a final abrasive layer; applying a size coat over the final abrasive layer; curing the make and size coats; and wherein the shaped abrasive particles comprise a vertex opposite a base and a width of the shaped abrasive particle tapers from the base to the vertex.

Method of making a coated abrasive article having shaped abrasive particles and resulting product

Methods of melt spinning to make amorphous and ceramic materials.

Method of making amorphous and ceramics via melt spinning

Method for making ceramic particles. Embodiments of ceramic particles made according to the present invention can be are particularly useful as abrasive particles.

Methods of making ceramic particles

Ceramic fibers comprising glass, and composites comprising such fibers. The glass comprises at least 35 percent by weight AlO, based on the total metal oxide content of the glass, a first metal oxide other than AlO, and a second, different metal oxide other than AlO. The glass contains not more than 10 percent by weight collectively AsO, BO, GeO, PO, SiO, TeO, and VO, based on the total weight of the glass. The first and the second metal oxides are each selected from the group consisting of YO, REO, MgO, TiO, CrO, CuO, NiO, FeO, ZrO, HfOand complex metal oxides thereof. At least a portion of the glass may be converted to crystals.

Ceramic fibers and composites comprising same

Ceramic materials and articles comprising at least 35 percent by weight AlO, and a plurality of cells having an average cell size of less than 3 micrometers.

Ceramic materials and methods of making and using the same

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.

Abrasive particles, abrasive articles, and methods of making and using the same

Abrasive particles and methods of making the same. Embodiments of the invention can be used to make abrasive particles. The abrasive particles can be incorporated into a variety of abrasive articles, including bonded abrasives, coated abrasives, nonwoven abrasives, and abrasive brushes.

Abrasive particles, and methods of making and using the same

Ceramics (including glasses and glass-ceramics) comprising nitrogen, and methods of making the same.

Ceramics, and methods of making and using the same

Composite articles (e.g., abrasive articles (e.g., abrasive wheels and honing sticks), cutting tools, and cutting tool inserts) comprising a glass-ceramic distributed in a ceramic matrix.

Composite articles and methods of making the same

AlO&#x2014;LaO&#x2014;YO&#x2014;MgO ceramics (including glasses, crystalline ceramics, and glass-ceramics) and methods of making the same. Ceramics according to the present invention can be made, formed as, or converted into glass beads, articles (e.g., plates), fibers, particles, and thin coatings. The particles and fibers are useful, for example, as thermal insulation, filler, or reinforcing material in composites (e.g., ceramic, metal, or polymeric matrix composites). The thin coatings can be useful, for example, as protective coatings in applications involving wear, as well as for thermal management. Some embodiments of ceramic particles according to the present invention can be are particularly useful as abrasive particles.

Growing community of inventors

Woodbury, MN, United States of America

Thomas J Anderson