摘要:
A method of producing a superconducting tape or a superconducting wire with a metal sheath (2), said method comprising mechanical deformations and a number of annealing steps. Additional surface layers (3) are according to the invention applied after the final annealing. As a result the surface material could be chosen nearly freely.
摘要:
The cross section of a wire is round and is composed of several units, each consisting of tape-like superconductors laminated in an approximately rhombic shape, which are arranged such that they form a hexagon as a whole. Oxide superconducting tape wires each consisting of a plurality of oxide superconducting filaments are arranged in rotational symmetry to a core. The oxide superconducting filaments have the cross section such that the average thickness is 3 to 20 µm and the average aspect ratio is larger than 2 and smaller than 10. A step of arranging the oxide superconducting tape-like wires in rotational symmetry is accomplished when the multi-core tape-like wires are packed in a third metal pipe which becomes a metal sheath later. Since the multi-core tape wires having oxide superconducting filaments are arranged in rotational symmetry, the oxide superconductor in the oxide superconducting filaments permits its c axis to orient in various directions. This makes it possible toss prevent the critical current from decreasing irrespective of the direction in which the magnetic field is applied and to increase the critical current density (Jc) because the oxide superconducting filament has an optimal size. The oxide superconductor should be a bismuth-based oxide superconductor, preferably be the one which has a composition of Bi 2 Sr 2 Ca 1 Cu 2 O x .
摘要翻译:线的横截面是圆形的,并且由几个单元组成,每个单元由以大致菱形形式叠层的带状超导体组成,其布置成使得它们整体形成六边形。 每个由多个氧化物超导细丝组成的氧化物超导带线布置成与核心旋转对称。 氧化物超导细丝具有平均厚度为3〜20μm,平均纵横比大于2且小于10的横截面。将氧化物超导带状线布置成旋转对称的步骤是在 多芯带状电线被包装在稍后成为金属护套的第三金属管中。 由于具有氧化物超导细丝的多芯带线以旋转对称的方式布置,氧化物超导细丝中的氧化物超导体允许其c轴在各个方向上取向。 这使得可以避免临界电流随着施加磁场的方向而降低,并且由于氧化物超导细丝具有最佳尺寸而增加临界电流密度(Jc)。 氧化物超导体应为铋基氧化物超导体,优选为具有Bi 2 Sr 2 Ca 1 Cu 2 x x x的组成的超导体。
摘要:
A superconducting article has a matrix core (1) containing a superconductor (2), a copper stabilizer layer (4) disposed about the core (1), and an insulating layer (5) surrounding the copper stabilizer layer (4). The insulating layer (5) is a metallurgically bonded layer of a refractory metal selected from Nb, Ta, V, and Mo.
摘要:
l'invention concerne un brin multifilamentaire à matrice (2) à base d'argent, comprenant une pluralité de filaments supraconducteurs HTc (3) ayant une section transversale de forme générale carrée ou rectangulaire, selon l'invention les filaments supraconducteurs HTc (3) sont arrangés en quinconce.
摘要:
An aluminium stabilized superconductor (10) in which superconducting cable (12) is embedded within a high purity aluminum stabilizer (14). The stabilizer (14) is, in turn, partially surrounded by an aluminum alloy sheath (16). The aluminum alloy sheath (16) is constructed so that at least one exterior surface (18) of the stabilizer (14) is open for exposure to a coolant. Preferably, this open exterior surface (18) of the stabilizer (14) is knurled for greater cooling efficiency.
摘要:
A superconductive wire having a metallic superconductive multi-core filament in a matrix metal of a copper alloy. The alloy contains at least one of predetermined elements, and its resistivity (Z) at room temperature, as defined by a predetermined calculation formula based on the chemical composition of the alloy, is in a range of 2 x 10-8 Φm « Z « 65 x 10-8 Φm and the interval (L) between the filaments is L » 0.0625 x 1/XZ nm. The above constitution helps improve composite machinability, decrease AC loss, and increase critical current density (Jc).
摘要:
An elongated superconducting body (68a) has a core of superconducting oxide grains (82). The grains have at least one thin first dimension that is less than or equal to ten times the average length of the superconducting oxide grains of a first significant fraction in the core. The body has a constraining non-superconducting boundary member substantially circumscribing the superconducting core (80). The superconducting body can be fabricated by providing a metallic precursor core of the metallic elements of the superconducting oxide in substantially the stoichiometric proportions to form the superconducting oxide; providing a constraining non-superconducting boundary member substantially circumscribing the metallic precursor core; deforming the combined metallic precursor core and boundary member to an elongated shape having at least one thin first dimension; and heat treating the deformed combined precursor core and boundary member so as to produce a first significant fraction of oxide superconductor grains of the precursor core having an average length that is greater than one-tenth the thin first dimension of the deformed metallic precursor core.
摘要:
Conducteur électrique du type constitué par l'assemblage de brins conducteurs élémentaires constitués chacun de filaments de matériau faiblement résistif ou supraconducteur noyés dans une matrice de matériau fortement résistif, l'assemblage étant constitué de n étages de sous-conducteurs (SC1, SC2, SC3), un sous-conducteur d'étage j commprenant n j sous-conducteurs trabsposés d'étage j-1, un conducteur d'étage comprenant ainsi un nombre Nj = n1.n2. ...nj brins, caractérisé en ce que la relation suivante est vérifiée: Σ j=1 n ε j l j (N j - N j-1 ) + 1 2p₀ = λ. p₀ 4πS , dans laquelle: εj est égal à +1 lorsque le sens de transposition du sous-conducteur j est le même que le sens de torsadage des brins, et égal à -1 dans le cas contraire, p0 est le pas de torsadage du brin élémentaire, lj est la longueur développée d'un élément de sous-conducteur d'étage j sur un pas de transposition, S est la section droite de la zone filamentaire brin élémentaire, λ est un facteur compris entre 0,8 et 1,2.