Abstract: This invention provides for provides for abrasive compositions and methods of use of these compositions for the preparation of surfaces for the application of various coatings such as paints, lacquers and varnishes. The abrasive compositions of the invention provide rapid cleaning and dulling of the underlying surface rendering it suitable for the application of paints or other finishes.

Abstract: A method for manufacturing a lapping board having abrasive grains fixed on its surface, which is performed by the steps of: preparing a rotatable metal board having a surface of soft metal, an abrasive slurry-supplying tool arranged over the surface of the metal board, an abrasive-pressing tool which is placed on the metal board and has a hard surface, and a ultrasonic oscillation-generating tool attached to either or both of the abrasive-pressing tool and the metal board; rotating the metal board while supplying an abrasive slurry onto the surface of the metal board and while supplying electric power to the ultrasonic oscillation-generating tool to generate and apply ultrasonic oscillation to either or both of the abrasive-pressing tool and the metal board, whereby introducing the supplied abrasive slurry between the metal board and the abrasive-pressing tool and partly embedding some abrasive grains onto the metal board; and removing unfixed abrasive grains from the metal board.

Abstract: The invention provides a method and apparatus for making an abrasive product comprising providing a substantially horizontally deployed flexible backing having a first surface bearing an at least partially cured primer coating and an opposite second surface; providing a dry flowable particle mixture comprising abrasive particles and particulate curable binder material; depositing a temporary layer comprising said particle mixture on the at least partially cured primer coating of the first surface of the backing; softening said particulate curable binder material to provide adhesion between adjacent abrasive particles; embossing the layer comprising softened particulate curable binder material and abrasive particles to provide a pattern of raised areas and depressed areas and curing the softened particulate curable binder material to convert the embossed layer into a permanent embossed layer comprised of cured particulate binder material and abrasive particles and cure the at least partially cured primer coati

Abstract: Methods for making glass-ceramics comprising Al2O3, REO, at least one of ZrO2 or HfO2 and at least one of Nb2O5 or Ta2O5. Glass-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. Some embodiments of glass-ceramic particles according to the present invention can be are particularly useful as abrasive particles.

Abstract: The invention provides a method and apparatus for making an abrasive product comprising providing a substantially horizontally deployed flexible backing having a first surface bearing an at least partially cured primer coating and an opposite second surface; providing a dry flowable particle mixture comprising abrasive particles and particulate curable binder material; depositing a plurality of temporary shaped structures comprised of said particle mixture on the at least partially cured primer coating of the first surface of the backing; softening said particulate curable binder material to provide adhesion between adjacent abrasive particles; and curing the softened particulate curable binder material to convert said temporary shaped structures into permanent shaped structures and cure the at least partially cured primer coating on the first surface of the backing. The invention also provides an abrasive product made by the method.

Abstract: The invention is directed to a polishing pad for use in chemical-mechanical polishing comprising a biodegradable polymer. The biodegradable polymer comprises a repeat unit selected from the group consisting of glycolic acid, lactic acid, hydroxyalkanoic acids, hydroxybutyric acid, hydroxyvaleric acid, caprolactone, p-dioxanone, trimethylene carbonate, butylene succinate, butylene adipate, monosaccharides, dicarboxylic acid anhydrides, enantiomers thereof, and combinations thereof. The invention is further directed to methods of its use.

Abstract: A superabrasive particle coated with a solidified coating of a molten braze alloy that is chemically bonded to the superabrasive particle is disclosed and described. In one aspect, the reactive metal alloy may be chemically bonded to at least about 80% of an outer surface of the superabrasive particle. Various methods for making and using such a coated superabrasive particle are additionally disclosed and described.

Abstract: A porous abrasive article that allows air and dust particles to pass through. The abrasive article has a screen abrasive and a polymer netting with hooks. The screen abrasive has an abrasive layer comprising a plurality of abrasive particles and at least one binder. The polymer netting cooperates with the screen abrasive to allow the flow of particles through the abrasive article.

Abstract: CMP pad dressers and their methods of manufacture are disclosed. One aspect of the present invention provides a CMP pad dresser having improved superabrasive grit retention in a resin layer. The CMP pad includes a resin layer, superabrasive grit held in the resin layer such that an exposed portion of each superabrasive grit protrudes from the resin layer, and a metal coating layer disposed between each superabrasive grit and the resin layer, where the exposed portions are substantially free of the metal coating layer. The metal coating layer acts to increase the retention of the superabrasive grit in the resin layer as compared to superabrasive grit absent the metal coating layer.

Abstract: A porous abrasive article that allows air and dust particles to pass through. The abrasive article has a screen abrasive and an apertured attachment interface with hooks. The screen abrasive has an abrasive layer comprising a plurality of abrasive particles and at least one binder. The apertured attachment interface cooperates with the screen abrasive to allow the flow of particles through the abrasive article.

Abstract: A planarizing slurry for mechanical and/or chemical-mechanical polishing of microfeature workpieces. In one embodiment, the planarizing slurry comprises a liquid solution and a plurality of abrasive elements mixed in the liquid solution. The abrasive elements comprise a matrix material having a first hardness and a plurality of abrasive particles at least partially surrounded by the matrix material. The abrasive particles can have a second hardness independent of the first hardness of the matrix material. The second hardness, for example, can be greater than the first hardness. The matrix material can be formed into a core having an exterior surface and an interior. Because the abrasive particles are at least partially surrounded by the matrix material, the abrasive particles are at least partially embedded into the interior of the core.

Abstract: An object of the present invention is to provide a polishing body, wherein the abrasive in the polishing body are extremely dispersed well, which provides stable polishing performance in the polishing process, and which can effectively reduce the occurrence of scratches even in a case a large quantity of the abrasive are contained. A polishing part constituting the polishing body in the invention is produced obtained by loading predetermined amounts of butadiene, styrene, methyl methacrylate, itaconic acid, acrylic acid, ?-methylstyrenedimer, and t-dodecylmercaptan in an autoclave, making the mixture react for 16 hours at 75° C. to obtain an emulsion wherein a copolymer is dispersed, adjusting this emulsion to pH8.5, incorporating cerium oxide powder with an average primary particle diameter of 0.3 ?m and stirring to obtain an aqueous dispersion, drying this aqueous dispersion by spreading it thinly across a film, and mold pressing the dried product obtained.

Abstract: The invention relates to a method for the production of a sintered, microcrystalline ?-Al2O3-based shaped body, which are used, for example, as abrasive bodies, wherein an ?-Al2O3 powder is used as starting material, said powder having an average particle diameter of <2 ?m, and processed with at least one binder and a solvent with the purpose of obtaining an extrudable material that is subsequently extruded. The extrudate is then further processed into a shaped body that is sintered at a temperature range of between 1300° C. and 1750° C.

Abstract: A polishing pad having a polishing surface, a back surface and a sidewall is provided. The sidewall is connected to the polishing surface and the back surface. The polishing pad includes a polishing region and a region neighboring to the polishing region. Wherein, at least one stress buffer pattern is designed in the neighboring region. The stress buffer pattern is formed to buffer the stress created during a polishing process to prevent the region from being protruded and thus prevent the surface of the region, once protruded, from rubbing against the wafer carrier to generate particles, so that contamination of the surface of the wafers can be avoided. On the other hand, at least one cambered surface can be designed on the sidewall of the polishing pad to prevent the sidewall from rubbing against the wafer carrier to generate particles, so that contamination can be avoided.

Abstract: An Al2O3 and ZrO2 based abrasive grain containing titanium compounds in a reduced form, especially in the form of oxides and/or suboxides and/or carbides and/or oxycarbides and/or oxycarbonitrides and/or suicides, corresponding to a proportion of 0.510 wt. %, expressed as TiO2, containing 20–50 wt. % ZrO2, wherein more than 75 wt. % of the ZrO2 is present in a tetragonal crystal form, having an overall carbon content of 0.03–0.5 wt. %, a proportion of impurities caused by raw materials of less than 3.0 wt. %, wherein the rare earth content calculated in the form of oxides is less than 0.1 wt. %, having an Si-compound content of 0.05–1.0 wt. %, expressed as SiO2, and an Al2O3 content of 50–80 wt.

Abstract: A flowable, granular abrasive material and method of manufacture thereof. The material is comprised of at least one abrasive grain selected from aluminum oxide, silicon carbide, cubic boron nitride and/or diamond and has a organic or inorganic coating comprised of a binder and an abrasive filling material in the amounts of 0.5 to 8% and 1 to 15% by weight, respectively. The filling material may include sulfides, phosphates, carbonates, halogenides, and/or sulfide-, carbonate- and/or halogenide-containing complex compounds. The binder may include a low-viscosity phenol resin, epoxy resin and/or polyurethane resin.

Abstract: A metal-coated cubic boron nitride abrasive grain obtained by forming grooves, in which the ratio (w/d) of the width (w) to the depth (d) is less than 1, and the ratio (w/L) of the width (w) to the length (L) is less than 0.1, on the surface of a cubic boron nitride abrasive grain. In this cubic boron nitride abrasive grain, the retention force (bonding strength) between the metallic coating and the cubic boron nitride abrasive grain is improved; therefore, it is possible to fabricate a resin bonded grinding wheel, in which a high grinding ratio (long life) and a low grinding power (superior grinding performance) are achieved, using such cubic boron nitride abrasive grains.

Abstract: There is provided a method of making a composite abrasive compact which comprises an abrasive compact bonded to a substrate. The abrasive compact will generally be a diamond compact and the substrate will generally be a cemented carbide substrate. The composite abrasive compact is made under known conditions of elevated temperature and pressure suitable for producing abrasive compacts. The method is characterised by the mass of abrasive particles from which the abrasive compact is made. This mass has three regions which are: (i) an inner region, adjacent the surface of the substrate on which the mass is provided, containing particles having at least four different average particle sizes; (ii) an outer region containing particles having at least three different average particle sizes; and (iii) an intermediate region between the first and second regions.

Abstract: A polycrystalline diamond compact for use in cutting operations with a renewable sharp cutting edge, high abrasion resistance and high impact strength. The polycrystalline diamond is a composite composed of a matrix of coarse diamond interspersed with large agglomerated particles of ultra fine diamond. The agglomerated particles produce sharp cutting edges that are protected from impact forces by the overall uniform matrix of coarse diamond crystals. The self-sharpening cutter is highly resistant to spalling and catastrophic fracture.

Abstract: The invention provides a method and apparatus for making an abrasive product comprising providing a substantially horizontally deployed flexible backing having a first surface bearing an at least partially cured primer coating and an opposite second surface; providing a dry flowable particle mixture comprising abrasive particles and particulate curable binder material; depositing a temporary layer comprising said particle mixture on the at least partially cured primer coating of the first surface of the backing; softening said particulate curable binder material to provide adhesion between adjacent abrasive particles; embossing the layer comprising softened particulate curable binder material and abrasive particles to provide a pattern of raised areas and depressed areas and curing the softened particulate curable binder material to convert the embossed layer into a permanent embossed layer comprised of cured particulate binder material and abrasive particles and cure the at least partially cured primer coati

Abstract: A method of producing a plurality of discrete ultra-hard abrasive particles includes the steps of providing a plurality of granules, each comprising at least one ultra-hard abrasive particle, a precursor for the abrasive particle and a solvent/catalyst for the abrasive particle or precursor of such a solvent/catalyst, placing the granules with a separating medium between adjacent granules in the reaction zone of a high pressure/high temperature apparatus, subjecting the contents of the reaction zone to elevated temperature and pressure conditions at which the ultra-hard abrasive particle is crystallographically stable, recovering thus treated material from the reaction zone and removing the separating medium in the treated material to produce a plurality of discrete abrasive particles.

Abstract: Capsulated abrasive compositions and a polishing pad using the same. More specifically, a polishing pad coated with compositions, which contain a capsulated abrasive, thereby used for planarizing interlayer insulating film formed on a semiconductor substrate by chemical mechanical polishing.

Abstract: A method for producing organically bonded abrasive article includes combining an abrasive grain component and a phenol-based resin component. The combined components are molded and thermally cured in an atmosphere that comprises humidity, wherein the atmosphere contacts the molded components, thereby producing the organically bonded abrasive grain. The abrasive grain optionally can first be combined with an organosilicon compound, to form organosilicon-treated abrasive grain, and then with the phenol-based resin component. In one example, the phenol-based resin is thermally cured in the presence of steam. Abrasive articles produced by the method of the invention generally have improved properties under wet grinding conditions. In one example, an abrasive article produced by the method of the invention includes ammonia in an amount less than about 50 ppm. In another example, an abrasive grinding wheel produced by the method of the invention has a strength retention greater than about 57 percent.

Abstract: The invention provides a method of making an embossed abrasive article comprising providing a sheet-like foam backing having a first surface and an opposite second surface; providing an abrasive coating comprising abrasive particles and binder over said first surface to provide an abrasive article; and applying under pressure a patterned embossing tool having an embossing surface including at least a pattern of raised areas to the abrasive coating of the abrasive article to provide an embossed pattern at least including depressed areas corresponding to the raised areas of the embossing surface in said abrasive coating and said foam backing to provide an embossed abrasive article.

Abstract: Method of making abrasive compositions comprised of water-insoluble abrasive polishing agents suspended in an aqueous medium in combination, which avoids the need and associated cost of dry milling the abrasive particle content, and products thereof. In particular, the abrasive compositions made by the method contain appropriately sized abrasive particles provided without the need for drying or dry milling, while also providing an abrasive composition which is Theologically stable, settling-resistant, and re-agglomeration resistant, even during and after transport and/or storage before end-use, such as incorporation into dentifrice formulations or other oral cleaning compositions.

Abstract: A method is provided for producing a plurality of polycrystalline ultra-hard abrasive grit. The method includes the steps of providing a mass of ultra-hard abrasive particles or a mass of a combination of a precursor for such particles and a suitable solvent/catalyst, forming the mass into a plurality of green state granules, placing the granules with a separating medium between adjacent granules in the reaction zone of a high pressure/high temperature apparatus, subjecting the contents of the reaction zone to elevated temperature and pressure conditions which the ultra-hard abrasive particle is crystallographically stable, recovering the thus sintered material from the reaction zone and removing the separating medium in the sintered material to produce a plurality of crystalline abrasive grit. The ultra-hard abrasive is generally diamond or cubic boron nitride.

Abstract: A method for chemical mechanical polishing of semiconductor substrates containing a metal layer requiring removal and metal interconnects utilizing a composition containing engineered copolymer molecules comprising hydrophilic functional groups and relatively less hydrophilic functional groups; the engineered copolymer molecules enabling contact-mediated reactions between the polishing pad surface and the substrate surface during CMP resulting in minimal dishing of the metal interconnects in the substrate.

Abstract: A superfinishing grindstone suitable for precision grinding, that contains either RB (rice bran) ceramic fine grains or CRB (carbonized rice bran) ceramic fine grains or a combination of both, for use as abrasive grains. The grains of RB ceramic fine grains and CRB ceramic fine grains have multiple small pores which allow the grains to be easily removed from a finished structure. These fine grains have a high Vickers hardness, which makes them highly resistant to bending, scratching, abrasion or cutting.

Abstract: An abrasive tool includes a superabrasive grain component, a filler component that comprises hollow bodies and a vitreous bond. Natural and synthetic diamond, cubic boron nitride and combinations thereof can be employed as the superabrasive grain component. The vitreous bond component includes zinc oxide and at least two alkali metal oxides. The vitreous bond component can further include barium oxide. A method for producing an abrasive tool includes combining a superabrasive grain component, a filler component that includes hollow bodies and a vitreous bond component that includes zinc oxide and at least two alkali metal oxides. The combined components are fired at a temperature in a range of between about 600° C. and about 850° C., preferably in an ambient air atmosphere.

Abstract: Objectives: To improve the cutting sharpness and life while the manufacturing cost is being lowered. Solution mechanism: The whetstone particle layer (13), which consists of multiple whetstone particle layer units (12), . . . , is configured on the surface (11a) of the whetstone substrate (11) while the respective whetstone particle layer units (12) are being mutually linked via the bridge unit (9). The non-whetstone particle unit (22) is configured between whetstone particle layer units (12) and (12). Whetstone particle layer unit (12) is obtained by configuring the superwhetstone particles (14) densely in the central unit (12a) and by configuring them sparsely in the peripheral unit (12b). The metal coupling phase (17), to which the superwhetstone particles (14) are fixed, is formed by the first and second metal plate phases (15) and (16), respectively. The thickness of the first metal plate phase (15) decreases from the central unit (12a) toward the peripheral unit (12b) in the shape of a mountain.

Abstract: An abrasive product is formed, in a blanket making machine, into a layer forming a blank including at least abrasive grains. The layer is then set atop on at least another material layer and assembled thereto. The installation includes, besides at least a blank making machine, an assembly line along which successive posts are provided at the site whereof the elements designed to form the grinder are set on top of one another to form a stack, a station for heating the stack, and at least a pressing machine to compress the heated stack. An embodiment need not include the heating station. The grinder is a thin grinder that can include at least a reinforcing layer pierced with a hole wherein the abrasive product is distributed. The process is useful for making grinders for parting, machining, or pumicing.

Abstract: An abrasive material comprises an integral mass of discrete lengths, not bonded to each other, of abrasive-coated non-woven synthetic fibres. In particular, the entanglement force between the said lengths is great enough to maintain a wad of the material when in use but small enough to allow the product to be shaped in the hand of a user.

Abstract: An abrasive product which comprises a polycrystalline mass of self-bonded abrasive particles of irregular shape, the product being substantially free of a second phase and containing substantial plastic deformation of the abrasive particles. The abrasive particles are preferably diamond or cubic boron nitride and the plastic deformation of the particles is preferably at least 0.3 percent. The abrasive product may be made by subjecting a mass of the particles to elevated temperature and pressure conditions.

Abstract: An abrasive filament, a cloth or non-woven made of the filament and an abrasive device, e.g., sanding disk, incorporating the fabric, cloth or non-woven and methods of producing the same are disclosed. The filament has an outer surface to which plural small size particles of an abrasive material are secured. The filament is formed from a mass of a molten polymer material, e.g., nylon, that has been extruded through a small diameter opening to form a hot elongated filamentary body. The abrasive particles, e.g., grit, are applied as a cloud or spray to the outer surface of the hot elongated filamentary body, whereupon they adhere to that surface and remain permanently secured thereto.

Abstract: The present invention is directed to abrasive articles comprising a resin transfer additive and methods of abrading a workpiece with the abrasive article. The resin control additive is a metal salt of a long chain fatty acid. The abrasive article comprises a backing having a major surface, and an abrasive layer secured to at least a portion of the major surface. The abrasive layer comprises a binder, abrasive particles distributed in the binder, and a resin control additive distributed in the binder, and wherein the abrasive layer has a substantially uniform thickness.

Abstract: A method of manufacturing a grinding wheel which includes a cylindrical core body and a plurality of part-cylindrical abrasive segment chips bonded to an outer circumferential surface of the cylindrical core body. The method includes: a firing step of firing an unfired part-cylindrical precursor to prepare each part-cylindrical abrasive segment chips, by using a supporting member whose coefficient of thermal expansion is different from that of each abrasive segment chip; and a bonding step of bonding the abrasive segment chips to the outer circumferential surface of the cylindrical core body with an adhesive interposed therebetween, by forcing each abrasive segment chip against the outer circumferential surface of the cylindrical core body, such that a force acting on the outer circumferential surface of the cylindrical core body is evenly distributed in an axial direction of the cylindrical core body while the adhesive is being hardened.

Abstract: An ultra-hard semiconductive polycrystalline diamond (PCD) material formed with semiconductive diamond particles doped with Li, Be or Al and/or insulative diamond particles having semiconductive surfaces, tools incorporating the same, and methods for forming the same, are provided. The ultra-hard PCD material may be formed using a layer of insulative diamond grit feedstock that includes additives therein, then sintering to convert a plurality of the diamond crystals to include a semiconductive surface. In another embodiment, the ultra-hard PCD material is formed by sintering semiconductive diamond grit feedstock consisting of diamond crystals doped with Li, Al or Be. The ultra-hard semiconductive PCD cutting layer exhibits increased cuttability, especially in EDM and EDG cutting operations.

Abstract: The invention provides a method and apparatus for making an abrasive product comprising providing a substantially horizontally deployed flexible backing having a first surface bearing an at least partially cured primer coating and an opposite second surface; providing a dry flowable particle mixture comprising abrasive particles and particulate curable binder material; depositing a plurality of temporary shaped structures comprised of said particle mixture on the at least partially cured primer coating of the first surface of the backing; softening said particulate curable binder material to provide adhesion between adjacent abrasive particles; and curing the softened particulate curable binder material to convert said temporary shaped structures into permanent shaped structures and cure the at least partially cured primer coating on the first surface of the backing. The invention also provides an abrasive product made by the method.

Abstract: Fully dense, diamond-silicon carbide composites are prepared from ball-milled microcrystalline diamond/amorphous silicon powder mixture. The ball-milled powder is sintered (P=5-8 GPa, T=1400K-2300K) to form composites having high fracture toughness. A composite made at 5 GPa/1673K had a measured fracture toughness of 12 MPa·m1/2. By contrast, liquid infiltration of silicon into diamond powder at 5 GPa/1673K produces a composite with higher hardness but lower fracture toughness. X-ray diffraction patterns and Raman spectra indicate that amorphous silicon is partially transformed into nanocrystalline silicon at 5 GPa/873K, and nanocrystalline silicon carbide forms at higher temperatures.

Abstract: A slurry for chemical mechanical polishing (CMP) of a copper or silver containing film provides at least one reactant for reacting with the copper or silver film to form a soft layer on the surface of the copper or silver film. The soft layer has a hardness less than the copper or silver film. The slurry preferably includes either no particles or particles which are softer than the copper or silver layer. A method for chemical mechanical polishing (CMP) a copper or silver containing film includes the steps of providing a slurry for reacting with the copper or silver film to form a soft layer on the surface of the copper or silver film and uses either no particles or particles softer than the copper or silver film, applying the slurry to the copper or silver film to form the soft layer, and removing the soft layer using a polishing pad.

Abstract: A conditioner for polishing pad and a method for manufacturing the same are disclosed. The conditioner comprises a substrate having formed with a plurality of geometrical protrusions of an uniformed height on at least one of its sides, and a cutting portion having a diamond layer of an uniformed thickness formed substantially on a whole surface of the side of the substrate having the geometrical protrusions. The geometrical protrusions have a flat upper surface or the upper surface may comprise a plurality of smaller geometrical protrusions formed by recessed grooves. The substrate is made from ceramic or cemented carbide materials and has a shape of a disk, a plate having multiple corner, a cup, a segment, or a doughnut with flattened upper and lower surfaces. The conditioner may further comprise a body portion being fixedly attached to the substrate at a side opposite to the side having formed with geometrical protrusions for linking the cutting portion to conditioning equipment.

Abstract: A method for fabricating an abrasive tool having a work surface commences by applying an electrically non-conductive layer the work surface of the abrasive tool. A pattern is etched in the work surface preferably using a laser beam. Metal and abrasive particles are electroplated or electroless plated onto the work surface pattern. The non-conductive layer is removed from the work surface. Alternatively, an adhesive can be applied as a layer on the work surface. A negative pattern then is etched in the adhesive layer, i.e., the adhesive where no abrasive is desired is etched away. Abrasive particles then can contact the work surface to be adhered thereon to the remaining adhesive. Metal again can be electroplated or electrolessly plated onto the work surface. By multiple repetitions of both methods, different sizes and types of abrasive particles in different concentrations may be applied to different areas of the work surface.

Abstract: A flowable, granular abrasive material and method of manufacture thereof. The material is comprised of at least one abrasive grain selected from aluminum oxide, silicon carbide, cubic boron nitride and/or diamond and has a organic or inorganic coating comprised of a binder and an abrasive filling material in the amounts of 0.5 to 8% and 1 to 15% by weight, respectively. The filling material may include sulfides, phosphates, carbonates, halogenides, and/or sulfide-, carbonate- and/or halogenide-containing complex compounds. The binder may include a low-viscosity phenol resin, epoxy resin and/or polyurethane resin.

Abstract: A method of manufacturing a grinding wheel which includes a cylindrical core body and a plurality of part-cylindrical abrasive segment chips bonded to an outer circumferential surface of the cylindrical core body. The method includes: a firing step of firing an unfired part-cylindrical precursor to prepare each part-cylindrical abrasive segment chips, by using a supporting member whose coefficient of thermal expansion is different from that of each abrasive segment chip; and a bonding step of bonding the abrasive segment chips to the outer circumferential surface of the cylindrical core body with an adhesive interposed therebetween, by forcing each abrasive segment chip against the outer circumferential surface of the cylindrical core body, such that a force acting on the outer circumferential surface of the cylindrical core body is evenly distributed in an axial direction of the cylindrical core body while the adhesive is being hardened.

Abstract: An apparatus and method for forming an endless spiral wound abrasive article and the resulting article. The apparatus includes first and second spaced-apart hubs, configured so that a portion of first and second webs passing between the first hub and the second hub is oriented substantially in a plane which remains stationery even if a position of a hub is changed. The apparatus further includes winders and a web joiner. The method includes providing a second web which includes an adhesive disposed on a first surface and a liner releasably affixed to the adhesive. The method includes removing the liner from the second web before positioning the second web adjacent the first web. The first and second webs are wound about the first and second hubs to form a spiral wound article having a desired circumference.

Abstract: Sintered alpha alumina-based abrasive particles comprising alpha alumina, Gd2O3, and ZnO, and methods of making the same. The abrasive particles can be incorporated, for example, into a variety of abrasive articles, including bonded abrasives, coated abrasives, nonwoven abrasives, and abrasive brushes.

Abstract: The present invention relates to a method for producing cubic boron nitride abrasive grains used for producing a grinding wheel, etc., and to cubic boron nitride abrasive grains. The method comprises maintaining a mixture containing hexagonal boron nitride and seed crystals of cubic boron nitride under pressure and temperature conditions where cubic boron nitride remains thermodynamically stable, characterized in that the seed crystals contain cubic boron nitride twin crystals.

Abstract: An ultra-hard semiconductive polycrystalline diamond (PCD) material formed with semiconductive diamond particles doped with and additive, as for example, Li, Be or Al and/or insulative diamond particles having semiconductive surfaces, tools incorporating the same, and methods for forming the same, are provided. The ultra-hard PCD material may be formed using a layer of insulative diamond grit feedstock that includes additives therein, then sintering to convert a plurality of the diamond crystals to include a semiconductive surface. In another embodiment, the ultra-hard PCD material is formed by sintering semiconductive diamond grit feedstock consisting of diamond crystals doped with an additive as for example Li, Al or Be. The ultra-hard semiconductive PCD cutting layer exhibits increased cuttability, especially in EDM and EDG cutting operations. A cutting element is provided having such a PCD layer. Furthermore, a bit is provided having a cutting element having such a PCD layer.

Abstract: A nonwoven composite cleaning pad is disclosed. The cleaning pad includes a first nonwoven layer having an absorbent surface. A second nonwoven layer is laminated to the first layer, and a plurality of abrasive polymer formations are provided on the exposed surface of the second layer.

Abstract: To provide an abrasive material which is excellent in loading resistance and durability, allows no attachments to attach to an abraded surface even when the end surface of the optical fiber is abraded, and is particularly suited for use in abrading a hard material such as an end surface of an optical fiber connector effectively and smoothly into a predetermined shape. The present invention provides an abrasive material for abrading an end surface of an optical fiber connector into a predetermined shape, the abrasive material having a base material (101) and an abrasive layer (102) disposed on the base material, the abrasive layer having a top layer (105) comprising an abrasive composite containing abrasive grains and a binder and a foot portion (106) comprising a binder in the absence of abrasive particles, the abrasive layer having a three-dimensional structure constructed with a plurality of regularly arranged three-dimensional elements (104) having a predetermined shape.