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7459031 |
A method for producing an Nb 3 Sn superconductive wire material using a powder process is provided, in which a powdered raw material is filled in a sheath made of Nb or an Nb-based alloy, and the above sheath is subjected to diameter red...
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7459030 |
Disclosed is a manufacturing method of an Nb 3 Sn superconductive wire using a powder technique, the method including the steps of: filling, as a raw powder, an intermetallic compound powder obtained from a metallic powder containing at ...
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7368021 |
Critical current densities of internal tin wire to the range of 3000 A/mm 2 at temperature of 4.2 K and in magnetic field 12 T are achieved by controlling the following parameters in a distributed barrier subelement design: wt % Sn in b...
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7354486 |
A composite multi-core wire rod in which a plurality of Al alloy wires containing 15 at % to 40 at % of Ge are arranged in Nb matrix at a core diameter of 2 μm to 20 μm is subjected to heating for at least five hours at a temperature r...
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7325293 |
A multi-filament superconducting wire in which the filaments comprise zirconia-stabilized ultra-fine grain Nb 3 Sn. The superconducting wire is formed by wire-drawing a preform comprising a metallic matrix and at least one niobium alloy ...
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7146709 |
A superconducting material useful for forming electrolytic devices is made by establishing multiple niobium or tantalum components in a primary billet of a ductile material; working the primary billet through a series of reduction steps ...
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7134181 |
A superfine multi-core Nb 3 Al superconductive wire is produced by getting a Nb 3 Al superconductive wire ready which was obtained by subjecting a precursor wire having a superfine multi-core structure in which a plurality of Nb/Al compl...
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6932874 |
A method for producing a superconductor having a high copper to superconductor composition (Cu/SC) ratio by cross-sectional area. An assembly is prepared formed of one or more fine filaments of a superconductor composition or of a precur...
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6918172 |
A niobium-based superconductor is manufactured by establishing multiple niobium components in a billet of a ductile metal, working the composite billet through a series of reduction steps to form the niobium components into elongated ele...
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6849137 |
An Nb 3 Sn-based superconductive wire which, when used in a superconductive magnet, manifests sufficient strength also against force along the radius direction in operating the magnet and reveals little deterioration in properties due to...
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6845254 |
By rapidly heating a precursor wire having a multifilamentary structure in which multiple composite cores in which a composite compound of an Nb—Ga compound and Nb is embedded in Nb are embedded in Nb, Ta, Nb-base alloy or Ta-base allo...
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6508889 |
A high-performance Nb 3 Al extra-fine multifilamentary superconducting wire is produced simply and inexpensively through the improvement of critical values, Tc, Hc 2 and Jc, without the addition of third elements such as Ge, Si and Cu. ...
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6376099 |
A Cu-containing Nb 3 Al multifilamentary superconductive wire having a multifilamentary (superfine multi-core structure that a large number of micro-complex cores each obtained by complexing a Cu—Al alloy containing Cu in an amount of ...
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6372054 |
A process for producing an ultrafine multifilamentary superconducting Nb 3 (Al,Ge) wire capable of generating a high critical current density comprising: preparing a composite core material comprising an A1—(2-30)at. % Ge alloy (where ...
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6358331 |
A tin alloy bath with controlled iron content is used for coating a niobium-base substrate with tin in a manufacturing process for triniobium tin superconductor. One hundred twenty-five parts per million by weight or less of iron is used...
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5690991 |
A method of forming a superconducting joint between the Nb 3 Sn layer of a superconducting tape and a superconducting NbTi wire through use of a Pb-Bi bath, joint securing arrangement and mold around the joint.
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5628836 |
The method of preparing an NB 3 Al superconducting wire comprises the steps of passing an Nb/Al composite wire consisting of an Nb metal or an Nb alloy and an Al metal or an Al alloy through a furnace for heating the same from the room ...
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5628835 |
Object of the present invention is to obtain a Nb 3 Al group superconductor having a high critical current density under a whole range of magnetic field from low to high such as 20 T level, manufacturing methods thereof, a Nb 3 Al grou...
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5620532 |
In a method for manufacturing Nb 3 Al phase by a diffusion reaction of Nb 2 Al phase and Nb phase, a part of the Nb 2 Al phase is remained and dispersed in the Nb 3 Al phase homogeneously as for magnetic flux pinning centers for a hi...
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5597423 |
A method to provide large sheets of Nb 3 Sn superconducting material suitable for use as a superconducting gradient shield in a magnetic resonance imaging system magnet by heating an anodized Nb-1 Zr sheet, tin dipping and reacting the ...
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5547518 |
Foils used to manufacture superconductor materials can effectively be cleaned by heat treatment prior to anodization and further processing steps. The heat treatment can be in conjunction with other cleaning processes or separate.
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5540787 |
The solid-liquid diffusion process used to form triniobium tin superconductor is improved by oxidizing the tin coated niobium substrate with an oxide layer on the surface of the tin coat after tin dipping. The oxide layer can be added to...
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5505790 |
A method is described which increases the critical current of triniobium tin by bonding thermal contraction control layers to the triniobium tin superconducting articles at a process temperature to form a composite, and subsequently cool...
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5504984 |
A method of manufacturing an Nb 3 Al superconducting wire includes a step of forming a wire by a jelly-roll process, a first thermal step of heating the obtained wire at a temperature of 500° to 700° C. for at least 10 hours for diffu...
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5501746 |
A process for preparing a superconducting wire having improved superconducting characteristics in shortened period of time at a reduced cost, which comprises the steps of forming a plurality of holes in each of Cu base metal plates, stuf...
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5472936 |
A method for making triniobium tin foil is disclosed where the niobium-based foil with an oxide layer is passed continuously at a set speed into an enclosed chamber. The enclosed chamber has an inert atmosphere which is substantially oxy...
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5445681 |
A method for producing a superconductor by partial inter diffusion of layers of metal under a diffusion heat treatment to provide a ductile beta phase alloy, along with undiffused metal layers to permit ease of extrusion and drawing to f...
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5362331 |
An electromagnetically stable Nb 3 Al multifilamentary superconducting wire having a high current density at a high level of magnetic field such as 20 tesla is provided by cold drawing a composite multicore consisting of a large number ...
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5228928 |
A method of manufacturing an Nb 3 Sn superconducting wire includes the steps of composing a desired number of rods, constituted by a material selected from the group consisting of Nb and an Nb alloy, in a Cu-Sn-based alloy matrix contai...
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5211765 |
The invention relates to a method for improving the springback qualities of superconductors. According to the method, a superconducting wire is in the final stage of production cold worked with a minimal reduction, in which case the spri...
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5182176 |
A Type II superconducting filament is formed by surrounding a Type II superconducting alloy ingot with layers of a fine grain Type II superconducting alloy sheet, a barrier layer and a copper extrusion can. The composite is then reduced ...
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5174831 |
A high field superconductor is formed of an A-15 superconductor in the form of a layer thinner than 1000Å. This layer is carried by a support layer formed of a normal metal, the support layer having a thickness less than 1000Å.
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5139893 |
A Type II superconducting filament is formed by surrounding a Type II superconducting alloy ingot with layers of a fine grain Type II superconducting alloy sheet, a barrier layer and a copper extrusion can. The composite is then reduced ...
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5123974 |
In one embodiment this invention provides a process for decreasing the resistivity of an electrical conductor. The process involves the application of high temperature and an external field to a conductor to induce a current flow and phy...
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5100486 |
A process is disclosed for forming a protective metal coating on a metal surface using a flux consisting of an alkali metal fluoride, an alkaline earth metal fluoride, an alkali metal fluoaluminate, an alkali metal fluosilicate, and mixt...
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5100481 |
A composite member is prepared which comprises a core which will have a compound superconducting layer when heat-treated, and a stock for forming a stabilizing member made of copper and surrounding the core. The composite member is heat-...
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5098798 |
A method is disclosed for fabricating a wire from niobium tin produced in situ in a filamentous structure capable of achieving the superconducting state which comprises overlapping a tin alloy core comprised of tin-magnesium eutectic all...
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5011545 |
A method for manufacturing a hard-to-work alloy article comprises the steps of: preparing a laminate member comprising a plurality of layers of different metals in a stoichiometric ratio for the intended alloy composition; dividing the l...
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4990411 |
A composite member is prepared which comprises a core which will have a compound superconducting layer when heat-treated, and a stock for forming a stabilizing member made of copper and surrounding the core. The composite member is heat-...
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4983228 |
A method for contraction annealing niobium-tin wire is disclosed. An improved niobium-tin wire is provided by loosely winding the wire on a mandrel, or by coiling the wire on a circumferentially retractile mandrel, and contraction anneal...
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4973527 |
A method is disclosed for fabricating a wire from niobium tin produced in situ in a filamentous structure capable of achieving the superconducting state which comprises overlapping a tin alloy core comprised of tin-magnesium eutectic all...
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4973365 |
The process for preparing a precursor Nb 3 Sn superconductor wire first assembling a billet comprising Nb rods surrounded by Cu material. A barrier material such as Nb is placed around the Cu and an outer stabilizer tube encases the bil...
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4776899 |
An improved multifilament superconductor is fabricated by the method in which a tin rod or tin based alloy rod is clad with a copper based alloy tube, the thus obtained copper-clad rod is further clad with a niobium based alloy tube, and...
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4767470 |
A process for producing a Ti-containing Nb 3 Sn composite superconductor which comprises working a composite composed of a Cu matrix, a Sn core placed centrally of the matrix and Nb cores disposed around the Sn core and heat-treating th...
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4746581 |
A multifilamentary, copper or copper alloy clad superconductive wire, comprising a superconductive, intermetallic compound Nb 3 Sn or V 3 Ga, having an A-15 crystal structure, and at least one additive metal from the group consisting o...
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4743713 |
An aluminum-stabilized Nb 3 Sn superconductor and process for producing same, utilizing ultrapure aluminum. Ductile components are co-drawn with aluminum to produce a conductor suitable for winding magnets. After winding, the conductor ...
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4646428 |
The centers of a plurality of copper tubes are filled with tin and drawn to form Cu-Sn wires which are cabled around a core Nb wire; a plurality of these strands are provided in a copper tube, or a copper foil or finely wound copper wire...
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4575927 |
A submicron-particle ductile superconductor and method of fabricating the same wherein the submicron particles (e.g., 300 Angstroms) of a superconductor (e.g., NbC) are encapsulated in a metal tube (e.g., copper) and then fabricated down...
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4560404 |
A method of producing a composite material of and Nb or V used for a superconductive wire comprises vacuum - melting two kinds of raw materials, 70 wt % Cu and 30 wt % Nb or V to form a melt; scattering the melt by a rotating disc to for...
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4537642 |
A method of manufacturing an Al-stabilized superconductor is disclosed. The method comprises combining into a composite a thin elongated Al member and a superconductive wire. The Al member is preferably comprised of high purity Al having...
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