Patent application number | Description | Published |
20080302023 | Cubic Boron Nitride Compact - A polycrystalline cubic boron nitride compact which comprises greater than 75 volume % and not greater than 90 volume % cubic boron nitride particles, the cubic boron nitride particles comprising particles of at least two average particle sizes, and a binder phase constituting the balance of the compact and comprising at least one titanium compound selected from titanium boride, titanium nitride, titanium carbide and titanium carbonitride and at least one aluminium compound selected from aluminium oxide, aluminium boride, aluminium nitride, aluminium carbide and aluminium carbonitride. | 12-11-2008 |
20090056232 | CUBIC BORON NITRIDE COMPACT - A CBN compact comprises CBN and a matrix phase incorporating a secondary hard phase selected from TiCN, TiC, TiN and mixtures and solid solutions thereof and a maximum amount of titanium diboride where the XRD peak height of the ( | 03-05-2009 |
20090080986 | CUBIC BORON NITRIDE COMPACT - A method of manufacturing a powdered composition or starting material used in producing a CBN compact which comprises CBN, a secondary hard phase and a binder phase includes two steps of attrition milling. First, the attrition milling of the secondary hard phase and the binder phase. Second, adding CBN particles to the fine particle mixture of the first attrition milling and then attrition milling this mixture. | 03-26-2009 |
20090181238 | CUBIC BORON NITRIDE COMPACT - A composition for use in producing a CBN compact comprising about 45 to about 75 volume % CBN, where the CBN is comprised of particles of more than one average particle size, preferably bimodal; a secondary hard phase including a compound containing a nitride, carbonitride or carbide of a Group 4, 5 or 6 transition metal or a mixture or solid solution thereof, and a binder phase. | 07-16-2009 |
20090293370 | Cubic Boron Nitride Compact - A method of making polycrystalline CBN compacts, high in CBN content, is provided. The method includes making a powdered composition by subjecting a mixture of CBN, present in an amount of at least 80 volume percent of the mixture, and a powdered binder phase to attrition milling. This powdered mixture is subjected to conditions of elevated temperature and pressure suitable to produce CBN compacts. | 12-03-2009 |
20120042576 | CUBIC BORON NITRIDE COMPACT - A CBN compact which contains CBN and a matrix phase, wherein the CBN grain size volume frequency distribution has a distribution spread expressed as d90-d10 of 1 micron or greater, and the d90 maximum value is 5 micron or less. | 02-23-2012 |
20150041225 | POLYCRYSTALLINE SUPERHARD MATERIAL AND METHOD FOR MAKING SAME - A method of making a body of polycrystalline superhard material comprising placing an aggregated mass of grains of superhard material into a canister, placing a ceramic layer either in direct contact with the aggregated mass of grains of superhard material or in indirect contact therewith, the ceramic layer being spaced from the grains by an interlayer of material when present, the ceramic layer having a surface with surface topology, the surface topology imprinting a pattern in the aggregated mass of grains of superhard material complementary to the surface topology, the ceramic material and the material of the interlayer being such that they do not react chemically with the superhard material and/or a sinter catalyst material for the grains of superhard material. The aggregated mass of grains of superhard material and ceramic layer are subjected to a pressure of greater than 5.5 GPa and sintered to form a body of polycrystalline superhard material having a surface topology complementary to the surface topology of the ceramic layer. The ceramic layer and interlayer if present are then removed from the body of polycrystalline material. There is also disclosed a body of polycrystalline superhard material having a surface topology on a first surface, the first surface being substantially free of material from a canister used in formation of the body of polycrystalline superhard material. | 02-12-2015 |