A method for restoring superconductivity of a wire having a core of reacted MgB2 comprises subjecting said wire to a two-phase heat treatment, wherein a first phase comprises heating in a range of 800° C. to 1000° C. during 20 minutes to 40 minutes and a second phase comprises heating in a range of 550° C. to 750° C. during 45 minutes to 75 minutes.
A joint of superconducting wires having at least two superconducting wires, each with a sheath and with a core of reacted superconducting MgB2. At least one first superconducting wire has a first flattened end and at least one second superconducting wire has a second flattened end. The joint further has a tubular metal connector having a centre filled with MgB2 material. The first flattened end of the first superconducting wire is inserted at one side of the connector until it is in contact with the MgB2 material, the second flattened end of the second superconducting wire is inserted at the other side of the connector until it is in contact with the MgB2 material, the connector is pressed at both sides to fix the superconducting wires, and the centre of the connector is pressed to compact the MgB2 material.
H02G 15/18 - Cable junctions protected by sleeves, e.g. for communication cable
H02G 1/14 - Methods or apparatus specially adapted for installing, maintaining, repairing, or dismantling electric cables or lines for joining or terminating cables
3.
TITANIUM DEPOSITION WIRE OF THE POWDER-IN-TUBE TYPE
A deposition wire of the powder-in-tube type comprises a hollow tubular portion of titanium and a core portion filling the tubular portion. The core portion occupies between (30) volume % and (80) volume % of the deposition wire. The core portion comprises compacted elongated powders of titanium and possibly also comprises other compacted powders selected from the group consisting of aluminium, vanadium, aluminium-vanadium, chromium, molybdenum, boron, niobium, tantalum, nickel, zirconium, silicon, copper, tin, iron and palladium. Due to the high volume of the core portion, the process of making the wire is less complex.
B23K 35/40 - Making wire or rods for soldering or welding
B22F 7/04 - Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting of composite layers with one or more layers not made from powder, e.g. made from solid metal
C22C 1/04 - Making non-ferrous alloys by powder metallurgy
H01L 39/02 - Devices using superconductivity or hyperconductivity; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof - Details
H01L 39/24 - Processes or apparatus specially adapted for the manufacture or treatment of devices provided for in group or of parts thereof
H01R 4/68 - Connections to or between superconductive conductors
5.
METHOD FOR RESTORING SUPERCONDUCTIVITY OF AN MGB2 WIRE
2 2 comprises subjecting said wire to a two-phase heat treatment, wherein a first phase comprises heating in a range of 800 °C to 1000 °C during 20 minutes to 40 minutes and a second phase comprises heating in a range of 550 °C to 750 °C during 45 minutes to 75 minutes.
H01L 39/02 - Devices using superconductivity or hyperconductivity; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof - Details
H01L 39/24 - Processes or apparatus specially adapted for the manufacture or treatment of devices provided for in group or of parts thereof
H01R 4/68 - Connections to or between superconductive conductors
6.
TITANIUM DEPOSITION WIRE OF THE POWDER-IN-TUBE TYPE
A deposition wire of the powder-in-tube type comprises a hollow tubular portion of titanium and a core portion filling the tubular portion. The core portion occupiesbetween (30) volume % and (80) volume % of the deposition wire. The core portion comprises compacted elongated powders of titanium and possibly also comprisesother compacted powders selected from the group consisting of aluminium, vanadium, aluminium-vanadium, chromium, molybdenum, boron, niobium, tantalum, nickel, zirconium, silicon, copper, tin, iron and palladium.Due to the high volume of the core portion, the process of making the wire is less complex.
B23K 35/02 - Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
B22F 3/00 - Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sinteringApparatus specially adapted therefor
B23K 35/32 - Selection of soldering or welding materials proper with the principal constituent melting at more than 1550°C
B23K 35/40 - Making wire or rods for soldering or welding
B22F 3/18 - Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sinteringApparatus specially adapted therefor by using pressure rollers
B22F 5/12 - Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of tubes or wires
B22F 7/08 - Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting of composite workpieces or articles from parts, e.g. to form tipped tools with one or more parts not made from powder
C22C 1/04 - Making non-ferrous alloys by powder metallurgy
A magnesiumdiboride (MgB2) powder-in-tube (PIT) wire has a cross-section showing —voids, —magnesiumdiboride, and —oxides, as measured by energy-dispersive X-ray spectroscopy. Oxides are located at the borders between the voids and the magnesiumdiboride. The MgB2 PIT wire has a higher degree of superconductivity.
C04B 35/58 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxides based on borides, nitrides or silicides
C04B 35/626 - Preparing or treating the powders individually or as batches
H01B 1/02 - Conductors or conductive bodies characterised by the conductive materialsSelection of materials as conductors mainly consisting of metals or alloys
H01B 12/00 - Superconductive or hyperconductive conductors, cables or transmission lines
H01B 13/00 - Apparatus or processes specially adapted for manufacturing conductors or cables
A superconductor (10, 30) has a twisted structure and is adapted to form windings in a superconducting coil. The superconductor (10, 30) comprises at least one superconductor wire. The superconductor further comprises at least one elongated electrical insulation element (18, 37). The elongated electrical insulation element(s) (18, 37) is/are twisted with or around the superconductor wire(s) in order to create a separation distance with an adjacent superconductor wire in a neighbouring winding, The elongated electrical insulation element(s) (18, 37) and the superconductor wire(s) may be twisted in one and the same twisting operation.
H01F 6/06 - Coils, e.g. winding, insulating, terminating or casing arrangements therefor
H01F 41/04 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets for manufacturing coils
There is provided a method of manufacturing a continuous wire comprising forming a strip formed from at least one metallic material into a channel, placing at least one powder into the channel and sealing edges of the channel together to produce a wire, wherein the method further comprises mixing the powder with a carrier liquid to create a slurry and placing the slurry into the channel. The carrier liquid is chemically inert with respect to the at least one powder.
H01L 39/24 - Processes or apparatus specially adapted for the manufacture or treatment of devices provided for in group or of parts thereof
B22F 5/12 - Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of tubes or wires
B22F 1/00 - Metallic powderTreatment of metallic powder, e.g. to facilitate working or to improve properties
C22C 29/14 - Alloys based on carbides, oxides, borides, nitrides or silicides, e.g. cermets, or other metal compounds, e. g. oxynitrides, sulfides based on borides
There is provided a method of manufacturing a continuous wire comprising forming a strip (10) formed from at least one metallic material into a channel (21), placing at least one powder (32) into the channel (21) and sealing edges of the channel (21) together to produce a wire (28), wherein the method further comprises mixing the powder (32) with a carrier liquid (41) to create a slurry and placing the slurry into the channel (21). The carrier liquid is chemically inert with respect to the at least one powder.
B22F 5/12 - Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of tubes or wires
C22C 29/14 - Alloys based on carbides, oxides, borides, nitrides or silicides, e.g. cermets, or other metal compounds, e. g. oxynitrides, sulfides based on borides
There is provided a superconductive wire comprising a central core surrounded by a sheath, wherein the central core comprises an innermost region (74) formed from a first set of constituents surrounded by an outer region (70) formed from a second set of constituents. The constituent(s) of the outer region are selected to act as a barrier between the sheath and the first set of constituents. A method of forming the wire to avoid voids in the central core is provided.
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