Provided is a polishing composition in which a polishing speed of silicon germanium is sufficiently high and a selection ratio of the polishing speed of silicon germanium is sufficiently high. A polishing composition includes: abrasive grains; an inorganic salt; and an oxidizing agent, in which the number of silanol groups per unit surface area of the abrasive grains is more than 0/nm.sup.2 and 2.0/nm.sup.2 or less, and a pH of the polishing composition is 6.0 or more.

A surface modified abrasive particle may include a core abrasive particle and a coating functionally connected to a surface of the core abrasive particle. The core abrasive particle may have a median particle size of at least about 0.06 microns. The coating may include a compound selected from the group consisting of dopamine, tyrosine, dihydroxyphenylalanine, norepinephrine, epinephrine, normetanephrine, 3,4-dihydroxyphenylacetic acid, tannic acid, pyrogallic acid or combinations thereof.

The present disclosure relates to abrasive articles including conformable coatings, e.g. a hydrophilic coating, and polishing systems therefrom. The present disclosure provides an abrasive article including a body having an abrading surface and an opposed second surface, wherein the abrading surface of the body includes a plurality of inorganic abrasive particles; a conformable metal oxide coating adjacent to and conforming to the plurality of engineered features, wherein the conformable metal oxide coating includes a first surface; and a conformable polar organic-metallic coating in contact with the first surface of the conformable metal oxide coating, wherein the conformable polar organic-metallic coating includes a chemical compound having at least one metal and an organic moiety having at least one polar functional group.

A buffing and polishing member has an uncompressed monolithic body of foam material having slits from an outside surface toward and less than a distance to a rotational axis of the body. The slits, on circumferential spaced planes, extend generally radially from the outside surface toward and less than a distance to the rotational axis to define a plurality of foam fingers and an unslit center portion. A fastening mechanism holds the center portion of the slit foam body in a compressed state along the rotational axis such that the uncompressed outer ends of the foam finger define a spherocylinder.

A composite coating is provided for a tool. The tool can be a pair of scissors or a screwdriver for example. The tool is made with at least one contact face. The composite coating includes diamond grains and layer of metal oxidant. The metal oxidant is used as catalyst to secure the diamond grains to the contact face.

With a method for the production of a grinding tool, a tool base body is provided, which configures a three-dimensionally shaped adhesive sur-face by application of a bonding agent. The tool base body is positioned in a way that the adhesive surface is arranged in an electrostatic field, be-tween a first electrode and a second electrode. Into the electrostatic field, abrasive grains are introduced, which, due to the electrostatic field, move towards the adhesive surface and adhere to same. The grinding tool produced in this manner has a three-dimensionally shaped abrasive grain layer. The production of the grinding tool is simple, flexible and economical. The grinding tool has a randomly shaped abrasive grain layer and can be applied in a manifold manner with a high cutting performance and a long service life.

A mirror finishing method for forming a mirror surface on a workpiece with a mirror finishing tool including a conically shaped cutting tool made of polycrystalline diamond or cubic boron nitride that is attached to a distal end of a shank, performs mirror polishing by abutting a conical surface of the cutting tool against a machined surface of the workpiece with the shank tilted with respect to the machined surface of the workpiece.

A shaped abrasive agglomerate particle includes a shaped abrasive particle bonded in a vitreous matrix. The shaped abrasive particles have a longest particle lineal dimension on a surface and a shortest particle dimension perpendicular to the longest particle lineal dimension, and the longest particle lineal dimension is at least twice the shortest particle dimension. The shaped abrasive agglomerate particle has a longest agglomerate lineal dimension on a surface and a shortest agglomerate dimension perpendicular to the longest agglomerate lineal dimension, and the longest agglomerate lineal dimension is at least twice the shortest agglomerate dimension. The abrasive agglomerate particles are useful in abrasive articles. Methods of making the shaped abrasive agglomerate particle and abrading a workpiece are also described.

A surface modified abrasive particle may include a core abrasive particle and a coating functionally connected to a surface of the core abrasive particle. The core abrasive particle may have a median particle size of at least about 0.06 microns. The coating may include a compound selected from the group consisting of dopamine, tyrosine, dihydroxyphenylalanine, norepinephrine, epinephrine, normetanephrine, 3,4-dihydroxyphenylacetic acid, tannic acid, pyrogallic acid or combinations thereof.

A coated abrasive article (10) having a flexible backing (12) and an abrasive coat (20) attached to the backing (12) by a tie coat (18), wherein the tie coat (18) is liquid-softenable such that the tie coat (18) maintains the flexible backing (12) in a substantially rigid state when the tie coat (18) is dry and allows the backing (12) to flex when the tie coat (18) is in its softened state.