An adhesion promoter comprises a reaction product of: a) a polyepoxide; b) an aminosilane represented by the formula HNR.sup.1R.sup.2. R.sup.1 and R.sup.2 independently represent —Z—SiL.sub.3. Each Z independently represents a divalent linking group having from 1 to 12 carbon atoms, and each L independently represents a hydrolyzable group; and c) an isocyanatosilane represented by the formula O═C═N—Z—SiL.sub.3, wherein Z and L are as previously defined. The adhesion promoter may be used to treat a surface of a substrate such as an abrasive particle, which may be included in a resin-bond abrasive article.

A mold for making abrasive particles is presented. The mold includes a surface and a plurality of cavities extending downward from the surface. Each cavity includes a particle shape portion comprising a polygonal shape and a fracture portion coupled to the particle shape portion. The fracture portion is configured to break from the particle shape portion during a stress event, resulting in a fractured shape abrasive particle.

An abrasive article including a backing; a plurality of shaped abrasive particles overlying the backing; where the abrasive article further has: 1) a Swarf Mode Gray Value of less than 25 for cumulative material removed of at least 500 g according to the Inconel Grinding Swarf Color Test; 2) a Maximum Swarf Mode Gray Value of less than 25 for a cumulative material removal of not greater than 700 g according to the Inconel Grinding Swarf Color Test; or 3) a combination of 1) and 2).

A method for forming an abrasive article via an additive manufacturing technique including forming a layer of powder material comprising a precursor bond material and abrasive particles, compacting at least a portion of the layer to form a compacted layer, binding at least a portion of the compacted layer, and repeating the steps of forming, compacting, and binding to form a green body abrasive article.

An intermediate raw material according to the present invention includes a charge control agent having a critical packing parameter of 0.6 or more and a dispersing medium and a pH of the intermediate raw material is less than 7.

An abrasive article can include a body including a first portion coupled to a second portion in a radial plane. The body can include a central opening extending in an axial direction of the body through the first portion and through the second portion. The central opening can include a circumferential surface defining an inner diameter of the body. The circumferential surface can be defined by at least a portion of the first portion and at least a portion of the second portion. The first portion can include first abrasive particles contained within a first bond material, including an inorganic material, and the second portion can include second abrasive particles contained within a second bond material, including an organic material. The organic material can include epoxy. In an embodiment, the second portion comprises an elongation-at-fracture of less than 2.7%, a Stiffness Value of at least 8.3, or a combination thereof.

A polishing method according to the present invention, includes polishing a polishing object containing a silicon material by using a polishing composition containing abrasive grains, a tri- or more polyvalent hydroxy compound and a dispersing medium and having pH of less than 6.0.

The present disclosure provides a method of making a chemical mechanical planarization slurry. The method includes contacting a chemical mechanical planarization slurry precursor including a carrier and a plurality of abrasive particles with a semi-permeable fiber membrane. Upon contact, the method further includes separating the chemical mechanical planarization slurry precursor into a concentrate and an effluent. The concentrate includes the chemical mechanical planarization slurry and the effluent includes the carrier and a plurality of particles. The particles of the effluent have a median size that is less than a median size of the abrasive particles of the concentrate. In the method a pressure difference measured between an inlet to which the chemical mechanical planarization slurry precursor is supplied and a first outlet to which the effluent is supplied is in a range of from about 1 psi to about 15 psi.

A foam abrasive for grinding a workpiece includes a main part made of foam, in particular polyurethane foam, and abrasive grains which are fixed to at least one surface of the foam abrasive via a base binder made of thermoplastic polyurethane. The abrasive grains are covered with a cover binder.

A method of making abrasive particles includes: providing a slurry comprising non-colloidal solid particles and a liquid vehicle; forming at least a portion of the slurry into shaped bodies contacting a substrate; at least partially drying the shaped bodies to provide shaped abrasive precursor particles; separating at least a portion of the shaped abrasive precursor particles from the substrate; and converting at least a portion of the shaped abrasive precursor particles into shaped abrasive particles. The shaped abrasive particles comprise alpha alumina having an average crystal grain size of 0.8 to 8 microns and an apparent density that is at least 92 percent of the true density. Each shaped abrasive particle has a respective surface comprising a plurality of smooth sides that form at least four vertexes. Shaped abrasive particles, abrasive articles including them, and methods of using are also disclosed.