Abstract:
An abrasive article configured to grind a workpiece having a fracture toughness of less than about 6 MPa-m½ includes a body comprising abrasive particles contained within a bond material comprising a metal, wherein the body comprises a ratio of V AG /V BM of at least about 1.3, wherein V AG is a volume percent of abrasive particles within a total volume of the body and V BM is a volume percent of bond material within the total volume of the body, and wherein the abrasive particles have an average particle size of 1 to 45 microns.
Abstract:
An abrasive article includes a bonded abrasive having a body made of abrasive grains contained within a composite bond material. The composite bond material can include an organic material and a metal material. The body can also include a filler material made of a superabrasive material. In an embodiment, the filler material can have an average particle size at least about 10 times less than an average particle size of the abrasive grains.
Abstract:
An abrasive article includes a body having abrasive grains contained within a bond material comprising a metal or metal alloy, wherein the body comprises a ratio of VAG/VBM of at least about 1.3, wherein VAG is the volume percent of abrasive grains within the total volume of the body and VBM is the volume percent of bond material within the total volume of the body.
Abstract:
An abrasive is oversized with a layer consisting essentially of an inorganic anti-loading agent selected from the group consisting of metal silicates, silicas, metal carbonates, and metal sulfates. The metal silicates can be selected from the group consisting of magnesium silicates, potassium aluminum silicates, aluminum silicates, and calcium silicates. In one embodiment, the magnesium silicates include talc, the potassium aluminum silicates include micas, the aluminum silicates include clays, and the calcium silicates include wollastonite. The silicas can be selected from the group consisting of fused silica, fumed silica, and precipitated amorphous silica. The metal carbonates can inlude calcium carbonate. The metal sulfates can inlcude hydrous calcium sulfate or anhydrous calcium sulfate.
Abstract:
Abrasive articles comprising a plurality of abrasive particles, a combination of potassium tetrafluoroborate and a halogenated polymer, and a binder to which the plurality of abrasive particles are adhered, and methods of making and using the abrasive articles.
Abstract:
Incorporating hard particles in a matrix forming the surface of a member can significantly increase wear resistance. Practical use of diamond in industrial applications is limited as the carbon structure breaks down to graphite in air at temperatures over 700°C. When exposed to molten iron the diamond surface can also chemically react and dissolve into the iron. Metal compounds that coat the diamond can provide one or more protective layers that limit contact of the diamond surface with elements that will degrade its structure. Coating can also provide a wettable surface for the molten matrix during processing to improve retention of the particle in the matrix.
Abstract:
Schleifwerkzeug (1), insbesondere Trennscheibe, mit einer Matrix (2), insbesondere mit einer gesinterten Metallmatrix, und in die Matrix (2) eingebetteten Diamanten (3), wobei wenigstens der Mehrzahl der Diamanten (3) jeweils wenigstens ein verschleißfördendes Partikel (4) und/oder wenigstens ein verschleißhemmendes Partikel (5) zugeordnet ist, wobei das wenigstens eine verschleißfördende Partikel (4) bzw. das wenigstens eine verschleißhemmende Partikel (5) ebenfalls in die Matrix (2) eingebettet ist.
Abstract:
The invention relates to a grinding tool 1 for machining brittle materials. The grinding tool 1 has a core 2 and an abrasive rim 4. The abrasive rim 4 comprises abrasive particles 5 embedded in a matrix 6. The matrix 6 comprises a metallic bonding agent and possibly also a polymeric bonding agent. The metallic bonding agent contains silicon nitride in an amount that constitutes 0.02% -5.0 % by volume of the metallic bonding agent. The invention also relates to a method of manufacturing the grinding tool. In the method, abrasive particles are mixed with metal powder and silicon nitride and the mixture is sintered. Polymeric powder may also be added before sintering.
Abstract:
An abrasive compact may include an ultra-hard phase that may include ultra-hard particles having a Knoop hardness of 5000 KHN or greater, a sinter catalyst, and a reaction phase that may include a catalyst-ceramic compound having a Knoop hardness lower than that of the ultra-hard phase.