Abstract: The present heat-resistant tungsten alloy has a first phase containing W as a major component, a second phase having a carbonitride of at least one element of Ti, Zr and Hf and containing the carbonitride as a major component when W is removed, and a third phase having a carbide of at least one element of group 5A elements in the periodic table and containing the carbide as a major component when W is removed, the heat-resistant tungsten alloy having a Vickers hardness of 550 Hv or more at a room temperature, a displacement of 1 mm or more when leading to fracture, as determined in a three point bending test at 1200° C., and a 0.2% proof stress of 900 MPa or more, as determined in the three point bending test at 1200° C.

Abstract: The present heat-resistant tungsten alloy has a first phase containing W as a major component, a second phase having a carbonitride of at least one element of Ti, Zr and Hf and containing the carbonitride as a major component when W is removed, and a third phase having a carbide of at least one element of group 5A elements in the periodic table and containing the carbide as a major component when W is removed, the heat-resistant tungsten alloy having a Vickers hardness of 550 Hv or more at a room temperature, a displacement of 1 mm or more when leading to fracture, as determined in a three point bending test at 1200° C., and a 0.2% proof stress of 900 MPa or more, as determined in the three point bending test at 1200° C.

Abstract: An AlN sintered compact includes AlN crystal grains and a grain boundary phase, and the grain boundary phase is lower in Vickers hardness than the AlN crystal grains.

Abstract: A ceramic wiring substrate and method for manufacturing the same, the substrate having an up-and-down conduction body which is made by forming a porous structure body from a high melting point metal and then infiltrating a low-resistance metal in an up-and-down conduction hole subsequently formed in a substrate made in a plate shape through sintering a ceramic precursor, the conduction body having a normal composite structure without an abnormally grown particle, a void, a crack and the like and not having a problem of falling off from the substrate, as well as provided a semiconductor device using this substrate. An intermediate layer formed of at least one selected from a group of Mo, W, Co, Fe, Zr, Re, Os, Ta, Nb, Ir, Ru and Hf is formed on an inner surface of the up-and-down conduction hole of the substrate before being provided with the conduction body having the composite structure.

Abstract: There is provided a flat plate-like sintered tungsten alloy that can be molded into a complex shape by press working or forge processing. The flat plate-like sintered tungsten alloy contains 85% by mass or more and 98% by mass or less of W, 1.4% by mass or more and 11% by mass or less of Ni, and 0.6% by mass or more and 6% by mass or less of at least one substance selected from the group consisting of Fe, Cu and Co, wherein an elongation percentage of the flat plate-like sintered tungsten alloy in a planar direction is 20% or more.

Abstract: Provided are an ancillary material, used for shape processing, which is capable of shortening a processing time, avoiding a reduction in quality of a shape provided to a workpiece material, and allowing a relatively low manufacturing cost; a processing method using the ancillary material; and a method of manufacturing the ancillary material. The tungsten alloy grains (1) comprise: tungsten of greater than or equal to 80% by mass and less than or equal to 98% by mass; nickel; at least one kind of metal selected from the group consisting of iron, copper, and cobalt; and an inevitable impurity, a maximum diameter thereof is greater than or equal to 0.1 mm and less than or equal to 5.00 mm, and a specific surface area thereof is less than or equal to 0.02 m2/g. The tungsten alloy grains (1, 10), the workpiece material (30), an abrasive (20) are blended in a container (100) and the container is rotated, thereby processing the shape of the workpiece material (30).

Abstract: Provided are an ancillary material, used for shape processing, which is capable of shortening a processing time, avoiding a reduction in quality of a shape provided to a workpiece material, and allowing a relatively low manufacturing cost; a processing method using the ancillary material; and a method of manufacturing the ancillary material. The tungsten alloy grains (1) comprise: tungsten of greater than or equal to 80% by mass and less than or equal to 98% by mass; nickel; at least one kind of metal selected from the group consisting of iron, copper, and cobalt; and an inevitable impurity, a maximum diameter thereof is greater than or equal to 0.1 mm and less than or equal to 5.00 mm, and a specific surface area thereof is less than or equal to 0.02 m2/g. The tungsten alloy grains (1, 10), the workpiece material (30), an abrasive (20) are blended in a container (100) and the container is rotated, thereby processing the shape of the workpiece material (30).

Abstract: Provided is a vibration control mass body, as a mass body used for controlling with a high accuracy a vibration associated with high-speed movement of a movable body such as a stage, which is large-sized and to which a complicated shape can be imparted. The vibration control mass body (100) includes a plurality of platy members (10, 20). The plurality of members (10, 20) are respectively made of a tungsten alloy. The tungsten alloy contains, as a chief ingredient, tungsten of greater than or equal to 80% by mass and less than or equal to 99% by mass. The vibration control mass body (100) is used in a staging unit having a movable body in order to control a vibration associated with movement of the movable body.

Abstract: An electric contact of high performance that is constituted of a Cd-free Ag alloy posing no toxic problem, excels in insulating capability and can ensure stability of brazing and consumption characteristics and that can be used in a breaker or high-load electromagnetic switch; and electrical equipment including the electric contact. In particular, an electric contact comprised of an Ag alloy containing 1 to 9 mass % of Sn in which the amount of Cd as impurity is 0 or less than 0.01 mass %, the electric contact having a double layer structure composed of a surface-side first layer and an interior second layer wherein the first layer has a thickness of 10 ?m or greater and has an average hardness of 150 or higher on the microvickers scale stipulated in JIS while the second layer has an average hardness of higher than 130 on the same scale.

Abstract: An electrode material for electrical discharge machining made of a W—Cu alloy containing at least 40% by weight of W, at most 15% by weight of an additional element or a compound thereof, and a balance of Cu, contains, as the additional element or the compound thereof, at most 10% by weight of particles selected from an alkali metal element, an alkaline-earth metal element and a rare-earth element, and an oxide, a hydroxide, a nitride, a boride and a sulfide of the elements. For example, the additional element or the compound thereof is an oxide or a hydroxide of each of Ba, Nd and Ce. The particles have a mean particle diameter of less than 3 ?m or a mean interparticle spacing of at most 20 ?m. At least 30% of W particles contained in the alloy preferably have a particle diameter of at most 1 ?m. In addition, not more than 10% by weight of Ni can further be contained.

Abstract: A high specific-gravity EPDM composition consisting of a mixture of EPDM containing diene at less than 4.5 wt % and ethylene at not less than 58 wt % nor more than 80 wt % and having a Mooney viscosity ML1+4 not less than 50 nor more than 170 at 125° C. and a powdery material, containing powder whose specific gravity is not less than 12 as a main component thereof, added to the EPDM at not less than 80 wt % nor more than 97.5 wt % of a whole amount of the high specific-gravity EPDM composition.

Abstract: A high quality electrical contact that is made of a Cd free Ag alloy and can be applied to a breaker is provided. The electrical contact is made of an Ag alloy containing Sn and In each 1 to 9% by weight, and has a first layer as the surface layer and a second layer as an internal portion. The hardness of the first layer and the hardness of the second layer are equal to or more than 190 and equal to or less than 130, respectively, based on micro Vickers standard defined by JIS. The thickness of the first layer is within the range from 10 to 360 ?m. In particular, the electrical contact has a high quality temperature characteristic as well as a high quality welding resistance characteristic.

Abstract: A high quality electrical contact that is made of a Cd free Ag alloy and can be applied to a breaker is provided. The electrical contact is made of an Ag alloy containing Sn and In each 1 to 9% by weight, and has a first layer as the surface layer and a second layer as an internal portion. The hardness of the first layer and the hardness of the second layer are equal to or more than 190 and equal to or less than 130, respectively, based on micro Vickers standard defined by JIS. The thickness of the first layer is within the range from 10 to 360 ?m. In particular, the electrical contact has a high quality temperature characteristic as well as a high quality welding resistance characteristic.

Abstract: A high specific-gravity EPDM composition consisting of a mixture of EPDM containing diene at less than 4.5 wt % and ethylene at not less than 58 wt % nor more than 80 wt % and having a Mooney viscosity ML1+4 not less than 50 nor more than 170 at 125° C. and a powdery material, containing powder whose specific gravity is not less than 12 as a main component thereof, added to the EPDM at not less than 80 wt % nor more than 97.5 wt % of a whole amount of the high specific-gravity EPDM composition.

Abstract: There is disclosed a space accessory for forming a three-dimensional ornamental pattern. The space accessory includes a rotating center, necessary disk supports disposed along the rotating center and a predetermined number of vanes each having a design shape or pattern, said vanes being of the same shape, thickness and mass and fixed to the disk support for balanced rotation with a natural air current. For changes in the ornamental pattern of the space accessory there are only need in changes in the design or pattern of the vanes.

Abstract: A manufacturing method of super-heat-resisting alloy material characterized in comprising the steps of: (1) filling and sealing the powder of Ni-based super-heat-resisting alloy in a rubber mold; (2) subjecting the powder in the rubber mold to cold isostatic pressing; (3) sintering the compact in vacuum or in gas atmosphere at a temperature of 1000.degree. C. or more so that the sintered density increases to 95% or more than the theoretical density; and (4) next, subjecting the sintered compact to hot isostatic pressing.