Abstract: An abrasive article includes a first abrasive element, a second abrasive element, a resilient element having first and second major surfaces, and a carrier. The first element and the second abrasive element each comprises a first major surface and a second major surface. At least the first major surfaces of the first and second abrasive elements comprise a plurality of precisely shaped features. The abrasive elements comprise substantially inorganic, monolithic structures.

Abstract: [Problem] This invention aims to provide a production method of a fine grain polycrystalline diamond compact which is suitable for finishing cutting tool materials and/or ultra-precision machining tool materials. In the method, a freeze-drying process for preventing the growth of secondary particle formation is unnecessary, and an aid does not need to be mixed in advance. [Means for Resolution] Disclosed is a following production method of a fine grain polycrystalline diamond compact. Each of carbonate and a C—H based organic compound which is a solid at room temperature, is sandwiched between diamond powder layers to stack them up in layers in a Ta capsule. Particle size of the diamond powder is 4 ?m or less in average; and the organic compound is preferably one or more selected from among polyethylene, polypropylene and polystyrene. The layers in the capsule are sintered under the conditions of a pressure of 7.7 GPa or higher and a temperature of 2000° C. or higher.

Abstract: A method for manufacturing a cutting insert green body from a sinterable powder, a tool set for manufacturing the cutting insert green body by that method and the green body manufactured by the tool set. The tool set has axially moving upper and lower punches and radially moving side punches. The side punches move slidably on die rods. The side punches and die rods move in channels in a base body on which a cover plate is mounted. The upper and lower punches move in through holes in the cover plate and base body, respectively. The die rods are stationary during compaction of the sinterable powder. The upper, lower and side punches form surfaces of the green body and the die rods form some of the edges of the green body. The green body can have undercuts and the edges formed by the die rods can be non-linear in shape.

Abstract: An AlN substrate with excellent heat transfer efficiency between it and another member to be bonded to a bonding surface of the AlN substrate. The AlN substrate is composed of an AlN sintered body containing group 2A and 3A elements, and the surface roughness Ra of the bonding surface is 3 nm or less, and, in voids having long diameters of 0.25 ?m or more, the mean value is 1.5 ?m or less, and the maximum value is 1.8 ?m or less. A method for producing the AlN substrate includes sintering a precursor formed of a sintering material that contains 88.7 to 98.5 mass % with respect to AlN, 0.01 to 0.3 mass % with respect to a group 2A element in oxide equivalent, and 0.05 to 5 mass % with respect to a group 3A element in oxide equivalent to form a sintered body, and applying HIP treatment onto the sintered body.

Abstract: A method of deforming a component includes the step of forming the component from thermosetting, elastomeric microcellular polyurethane. The method further includes the step of heating at least a first portion of the component to a first temperature. The method further includes the step of compressing the first portion of the component while maintaining the first portion at the first temperature and while maintaining the second portion of the component at an undeformable state. The method of deforming the component shapes the first portion of the component. Preferably the method shapes the first portion of the component into a thin and/or complexly shape. The method of deforming the component also increases the first portion of the component relative to the second portion of the component, i.e. to densifying the component such that the component has varying density.

Abstract: Polycrystalline alumina and methods for manufacturing polycrystalline alumina exhibiting improved transmission in the infrared region. In one embodiment, polycrystalline alumina articles are formed by providing a powder of substantially alpha phase alumina having a grain size of up to about 1 ?m, dispersing the powder in a liquid to form a slurry comprising powdered solids and liquid, removing excess of the liquid from the slurry to form a body, heating the body to provide a densified body, hot isostatically pressing the densified body under conditions to provide an article having a density of at least about 99.9% of theoretical density, and optionally annealing the article, wherein one or more of the annealing or heating are performed in an inert, dry gas.

Abstract: A riser for an archery bow is formed from a fibrous composite material, the matrix of which may be a high heat distortion thermoplastic polymer, a very high heat distortion thermoplastic polymer, or a combination thereof. The riser may incorporate a spine formed from a different polymer or composite than the rest of the riser, or from metal. A method for producing a riser for an archery bow includes the steps of introducing a polymeric composite into a mold from a first end of said mold to facilitate a particular orientation of components of said polymeric composite, molding the polymeric composite to produce a billet that approximates a net shape of the riser, and then machining the billet to the final shape of the riser.

Abstract: A method of fabricating a scintillator includes forming a green part comprised of a nanometer-sized powder, sintering the green part at a first temperature for a first time period, and sintering the green part at a second temperature for a second time period.

Abstract: An apparatus comprises a molding unit having a punch and a mold cavity movable along a path between an open position in which said punch and said mold cavity are distanced apart from each other to receive a dose of plastics therebetween, and a closed position in which said punch and said mold cavity interact to form an item by pressing said dose, said punch being kept not above said cavity along said path.

Abstract: In methods of manufacturing optical components for infrared-light or ultraviolet-light applications, by lessening the expense consumed during finishing processes, a technique for manufacturing ceramic optical components inexpensively is realized. Raw material powders whose main constituent is ZnS, ZnSe or Ge, for ceramics for infrared-light optical components, and whose main constituent is CaF2 or MaF2, for ceramics for ultraviolet-light optical components, are molded into molded masses; the molded masses are sintered into sinters; and by pressing the sinters through a heating and compressing process, net-shape ceramic sinters can be produced. Alternatively, a finishing process is carried out after they are pressed into near-net shape. By shaping into net shape or near-net shape, the finishing process can be omitted, or the finishing process time and processing expense taken up can be decreased.

Abstract: A ceramic component is provided, including a ceramic body containing silicon carbide, and an oxide layer provided on the ceramic body, the oxide layer being formed by oxidizing the ceramic body in the presence of alumina having a submicron particle size.

Abstract: Lasing systems utilizing YAG and methods for producing a YAG suitable for lasing are provided. The lasing system comprises a laser activator and a laser host material is provided. The laser host material comprises a transparent polycrystalline yttrium aluminum garnet material defined by a low porosity of less than about 3 ppm.

Abstract: A method of producing a rare earth oxysulfide scintillating ceramic body includes heat treatment to form a consolidated body, followed by gas hot isostatic pressing (GHIPing). A powder is first provided having the general formula (M1-xLnx)2O2S, wherein M is a rare earth element, and Ln is at least one element selected from the group consisting of Eu, Ce, Pr, Tb, Yb, Dy, Sm, and Ho, and 1×10?6<X<2×10?1. The powder is heat treated to form a consolidated body having closed porosity, wherein heat treating is carried out at a temperature Tht. The consolidated body is GHIPed to a density not less than 99% of theoretical density, in a GHIPing environment having a temperature Thip, where 1100° C.<Thip<1500° C., to thereby form a densified body.

Abstract: This invention relates to a dense ceramics having ESD dissipative characteristics, tunable volume and surface resistivities in semi-insulative range (103-1011 Ohm-cm), substantially pore free, high flexural strength, light colors, for desired ESD dissipation characteristics, structural reliability, high vision recognition, low wear and particulate contamination to be used as ESD dissipating tools, fixtures, load bearing elements, work surfaces, containers in manufacturing and assembling electrostatically sensitive microelectronic, electromagnetic, electro-optic components, devices and systems.

Abstract: Methods of producing doped and undoped yttrium aluminum garnet and yttrium aluminum perovskite containing powders and the powders produced thereby are provided. Additionally, methods of forming doped and undoped polycrystalline yttrium aluminum garnet having a mean grain size of between about 1 ?m to about 3 ?m and the yttrium aluminum garnet produced thereby are provided. The doped and undoped polycrystalline yttrium aluminum garnet may be formed by sintering a compact and subsequently hot isostatically pressing the compact.

Abstract: The present invention provides a sintered silicon carbide jig production method capable of simply increasing the purity of a sintered silicon carbide jig. A method of producing a sintered silicon carbide jig comprising a process in which a second sintered body is heated at a temperature rising rate of 3 to 5° C./min up to heating treatment temperature selected in the range of 2200 to 2300° C. under an argon atmosphere, kept at the same heating treatment temperature for 3 hours, and cooled at a temperature lowering rate of 2 to 3° C./min down to 1000° C.

Abstract: The volume resistivity of a body consisting essentially of aluminum nitride is reduced by exposing the body to a soak temperature of at least about 1000° C. in an atmosphere deficient in nitrogen, such as an atmosphere consisting essentially of argon. The body can be, for example, a green body of aluminum nitride powder of a densified, or sintered body, such as a polycrystalline body. An electrostatic chuck has an electrode within a chuck body. A first portion of the chuck body, at a first side of the electrode, has a volume resistivity less than about 1×1013 ohm·cm at about 23° C. A second portion of the body, at a second side of the electrode, has a volume resistivity within one order of magnitude that of the first portion.

Abstract: An oxidation resistant carbon composite material comprises nanocrystalline silicon carbide regions distributed throughout a carbon matrix. The composite is prepared by intermixing in a solvent a silicon carbide precursor and a carbon precursor and forming a solution that is free of solids. After removing the solvent from the mixture, the remaining material is pyrolyzed and forms the characteristic nanocrystalline silicon carbide in a carbon matrix. A composite made by the subject method and a part made from the composite are also provided.

Abstract: In a known control method, a large deviation between the temperature of a heating plate and a temperature-setting pattern occurs, and an overshoot or undershoot occurs. Therefore, a workpiece is unstably formed, the number of defective parts is increased and the productivity is decreased. Any two temperatures from among the temperature of the heating medium in the inlet manifold 5 that distributes and supplies the heating medium to each heating plate, the temperature of the heating medium in the outlet manifold 8 that collects the heating medium discharged from the heating plates 4 and the temperature of the heating plates 4, are detected. Then, a temperature value is obtained by selecting any one of the two temperatures based on a temperature-setting pattern 16, or is obtained by obtaining a weighted average of at least two temperatures from among the three temperatures based on preset weights.

Abstract: The present invention relates to a zirconia/alumina composite and a manufacturing method thereof which provide a zirconia ceramic powder having a composition in a triangle composition range formed of three composition points of 92 mol % ZrO2-4 mol % Y2O3-4 mol % Nb2O5 (or Ta2O5), 89 mol % ZrO2-7 mol % Y2O3-4 mol % Nb2O5 (or Ta2O5), 86 mol % ZrO2-7 mol % Y2O3-7 mol % Nb2O5 (or Ta2O5) in a ternary system of ZrO2—Y2O3—Nb2O5 or Ta2O3 for thereby manufacturing a zirconia/alumina composite having a high strength and high toughness in a state that a low temperature degradation does not occur.

Abstract: A transparent scintillator material for rapid conversion of exciting radiation, such as x-rays, to scintillating radiation. The scintillator material has a cubic garnet host, and has praseodymium as an activator. The scintillator material may be a polycrystalline ceramic material. The polycrystalline ceramic is formed by sintering a powder formed by precipitation. The scintillator material may be integrated into computed tomography (CT) equipment or other x-ray imaging equipment. The scintillator material may also be integrated into a fast response x-ray detector system.

Abstract: A binder system for use in the formation of ceramic or other powder-formed greenware comprising a binder, a solvent for the binder, a surfactant, and a component that is non-solvent with respect to the binder and solvent. The non-solvent component exhibits a lower viscosity than the solvent when containing the binder and comprises at least a portion of an organic liquid having a 90% recovered distillation temperature of no greater than about 225° C. and more preferably less than 220° C. Also disclosed is a process of forming and shaping plasticized powder mixtures and a process for forming ceramic articles utilizing the binder system.

Abstract: The present invention relates to a method for sintering of a silicon nitride based material using gas pressure sintering technique. It has been found that using a sintering atmosphere containing nitrogen and 0.1-10 vol-% carbon monoxide a cutting tool material is obtained with improved properties, particularly increased edge toughness, when machining heat resistant alloys.

Abstract: A semiconductor-supporting device comprising a substrate made of an aluminum nitride-based ceramic material and having a semiconductor-placing surface, wherein an orientation degree of the aluminum nitride-based ceramic material specified by the following formula is not less than 1.1 and not more than 2.0.Orientation degree=[I'(002)/I'(100)]/[I(002)/I(100)]in which in an X-ray diffraction measurement, I'(002) is a diffraction intensity of a (002) face of the aluminum nitride-based ceramic material when X-rays are irradiated from the semiconductor-placing surface, I'(100) is a diffraction intensity of a (100) face of the aluminum nitride-based ceramic material when X-rays are irradiated from the semiconductor-placing surface, I(002) is a diffraction intensity of the (002) face of the aluminum nitride ceramic according to a JCPDS Card No. 25-1133, and I(100) is a diffraction intensity of the (100) face of the aluminum nitride ceramic according to a JCPDS Card No. 25-1133.

Abstract: A controlled dielectric loss, sintered aluminum nitride body having a density of greater than about 95% theoretical, a thermal conductivity of greater than about 100 W/m-K, and a dissipation factor measured at room temperature at about 1 KHz selected from:(a) less than or equal to about 0.001; and(b) greater than or equal to about 0.01.A process for producing a controlled dielectric loss, sintered aluminum nitride body, comprising heat treating an aluminum nitride body at sintering temperatures, including providing a heat treatment atmosphere which effects a selected nitrogen vacancy population in the aluminum nitride body at the sintering temperatures, and cooling the aluminum nitride body from sintering temperatures at a controlled rate and in a cooling atmosphere effective to control the selected nitrogen vacancy population.

Abstract: Preparing an electrically conductive ceramic composite by the steps of:1) mixing and milling tetragonal zirconia alloy or a composite of zirconia-alumina with zirconium diboride, and2) pressing in a die and sintering in an argon atmosphere between 1300.degree. and 1700.degree. C.

Abstract: A sintered silicon nitride-based body comprising 20% or less by weight of a grain boundary phase and the balance being a major phase of grains of silicon nitride and/or sialon, wherein the major phase contains a grain phase of a .beta.-Si.sub.3 N.sub.4 phase and/or a .beta.'-sialon phase, and a quantitative ratio of the grain phase of the .beta.-Si.sub.3 N.sub.4 phase and/or the .beta.'-sialon phase is in a range of 0.5 to 1.0 relative to the major phase; the grain boundary phase contains Re.sub.2 Si.sub.2 O.sub.7 (wherein Re represents a rare-earth element other than Er and Yb) as a first crystal component and at least one of ReSiNO.sub.2, Re.sub.3 Al.sub.5 O.sub.12, ReAlO.sub.3, and Si.sub.3 N.sub.4.Y.sub.2 O.sub.3 as a second crystal component; and a quantitative ratio of the first and second crystal components in the grain boundary phase to the grain phase of .beta.-Si.sub.3 N.sub.4 phase and/or the .beta.'-sialon phase ranges from 0.03 to 1.6.