Abstract:
The present invention relates to new compositions of matter, particularly metals and alloys, and methods of making such compositions. The new compositions of matter exhibit long-range ordering and unique electronic character.
Abstract:
A nanoheterostructure includes a first inorganic component and a second inorganic component one of which is a matrix, and the other of which is three-dimensionally and periodically arranged in the matrix, and has a three-dimensional periodic structure whose average value of one unit length of a repeated structure is 1 nm to 100 nm.
Abstract:
An arrangement producing metal nanoparticles includes a γ-ray irradiator installed in a radioactive shielding room, a reactor that is disposed to oppose the γ-ray irradiator, and a power supply installed outside the radioactive shielding room to supply power to the reactor. The reactor includes a container receiving reaction materials and transmitting the energy of γ-rays to reaction materials arranged inside of the reactor, an agitator that is installed in the container to be capable of rotating, and a driving source for receiving the power from the power supply to drive the agitator.
Abstract:
A method for effecting solar radiation in space prior to the solar radiation reaching Earth. The method includes the steps of choosing a location between the Earth and the sun, focusing reflected solar radiation from two reflectors upon the location, monitoring solar radiation that passes through the focal location, and adjusting the reflectors to increase the size or change the shape of the focal location. The disclosure further includes a structure having a single joint for articulating the structure, where the single joint rotates the structure about a first axis in response to a first input and where the single joint rotates the structure about a second axis in response to a second input.
Abstract:
A method of manufacturing a high-purity refractory metal or a an alloy based thereon, said refractory metal being selected from the group consisting of niobium, rhenium, tantalum, molybdenum, and tungsten, comprising the steps of compacting a mixed material, in the form of powders or small lumps, of a refractory metal or alloy to be refined together with one or two or more additive elements selected from the group of transition metal elements consisting of vanadium, chromium, manganese, iron, cobalt and nickel, and from the group of rare earth elements, sintering the resulting compact at a high temperature of at least 1000.degree. C. and a high pressure of at least 100 MPa, thereby forming a lower compound or nonstoichiometric compound between at least a part of the additive element or elements and the impurity gas ingredient element such as O, N, C, and H, contained in the refractory metal or alloy to be refined, and thereafter electron-beam melting the sintered body. The material's functions (superconductivity, corrosion resistance, high temperature resistance, etc.) and workability (forging, rolling, and cutting properties) are markedly improved.
Abstract:
This is a highly purified metal comprising one metal selected from the group consisted of titanium, zirconium and hafnium. The highly purified metal has an Al content of not more than 10 ppm. It also has an oxygen content of more than 250 ppm, each of Fe, Ni and Cr contents not more than 10 ppm and each of Na and K contents not more than 0.1 ppm. The highly purified metal is obtained by either purifying crude metal by the iodide process or surface treating crude metal to remove a contaminated layer existing on the surface thereof and then melting The surface treated material with electron bean in a high vacuum.
Abstract:
An apparatus for producing solidified metals of high cleanliness removes floating matter such as oxides from the surface of molten metals prior to melt atomization. The apparatus includes a water-cooled melt vessel having a dam extending from a sidewall of the vessel at an acute angle to the sidewall. The dam extends above a preselected metal surface level of the interior of the vessel to form a floating matter trap region within the apex of the acute angle. There is a passageway through the dam sufficiently remote from the trap region that floating matter in the trap region is not in communication with the passageway. The passageway may be entirely below the metal surface level or extend from below the metal surface level to above the metal surface level, but sufficiently far away that floating matter can be forced away from the passageway, as by the herding action of a plasma torch. A receptacle may be placed adjacent to the trap region so that the floating matter can be directed into the receptacle and removed from the melt surface.
Abstract:
A tantalum or tantalum alloy which contains pure or substantially pure tantalum and at least one metal element selected from the group consisting of Ru, Rh, Pd, Os, Ir, Pt, Mo, W and Re to form a tantalum alloy that is resistant to aqueous corrosion. The invention also relates to the process of preparing the tantalum alloy.
Abstract:
Described herein is a method of producing an alloy. The method includes pouring a stream of molten mixture of component elements of the alloy, separating the stream into discrete pieces, solidifying the discrete pieces by cooling before the discrete pieces contact any liquid or solid. Also described herein is another method of producing an alloy. This method includes pouring and solidifying a stream of molten mixture of component elements of the alloy into a rod or pulling a rod from a molten mixture of component elements of the alloy, before the rod contacts any liquid or solid, separating the rod into discrete pieces. An apparatus suitable for carrying out the methods above can include a container from which the molten stream is poured or the solid rod extends, one or more coil, conductive plates, a laser source, or an electron beam source arranged around the molten stream or the solid rod and configured to separate the molten stream or the solid rod into discrete pieces.
Abstract:
A tantalum or tantalum alloy which contains pure or substantially pure tantalum and at least one metal element selected from the group consisting of Ru, Rh, Pd, Os, Ir, Pt, Mo, W and Re to form a tantalum alloy that is resistant to aqueous corrosion. The invention also relates to the process of preparing the tantalum alloy.