摘要:
An aluminum-stabilized superconducting wire includes a superconducting wire member obtained by burying a superconducting filament in a copper matrix and an aluminum stabilizing member covered in an outer surface of the superconducting wire member, and the aluminum stabilizing member is constituted by an aluminum alloy having a 0.2% proof resistivity of 4 kg/mm² or more at a very low temperature and a residual resistance ratio of 250 or more. It is preferable that the aluminum alloy contains at least one element selected from 50 to 1,000 ppm of Zn, 50 to 150 ppm of Si, 50 to 400 ppm of Ag, 50 to 300 ppm of Cu, and 30 to 2,000 ppm of Ce, and that a balance is constituted by Aℓ and an inevitable impurity.
摘要翻译:铝稳定超导线包括通过将超导细丝埋入铜基体中而获得的超导线构件和覆盖在超导线构件的外表面中的铝稳定构件,铝稳定构件由具有 在非常低的温度下,0.2%的抗电阻率为4kg / mm 2以上,剩余电阻比为250以上。 优选的是,铝合金含有选自Zn,50〜150ppm的Si,50〜400ppm的Ag,50〜300ppm的Cu和30〜2000ppm的Ce中的至少一种元素, 并且平衡由A 1和不可避免的杂质构成。
摘要:
A multifilamentary superconducting cable (10) has two parallel spaced-apart guide wires (12,14). A first layer (16) of mutually parallel superconducting filaments (18) is woven partially around and between the guide wires (12,14) in a transposed braid. Likewise, a second layer (20) of mutually parallel superconducting filaments (22) is woven partially around and between the guide wires (12,14) in a transposed braid. Thus, the two layers (16,20) overlap each other as the respective layers (16,20) pass between the guide wires (12,14). the two superconducting layers (16,20) and two guide wires (12,14) are enclosed in a helical copper duct (24), with the guide wires (12,14) being oriented within the duct (24).
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 Ωm ≦ Z ≦ 65 x 10⁻⁸ Ωm and the interval (L) between the filaments is L ≧ 0.0625 x 1/√ Z nm. The above constitution helps improve composite machinability, decrease AC loss, and increase critical current density (Jc).
摘要:
The present invention provides an intermetallic compound-based, composite superconductor (1) suitable for use in superconducting coils for a high magnetic field, where the superconductive part is formed by thermal diffusion reaction, and which has such a structure that a metal layer (7) of high melting point and high resistance is provided at the outermost periphery of a strand comprising a plurality of filaments (2) containing a superconductive compound formed by diffusion reaction with the surrounding matrix (3), a stabilizer (5) surrounding the matrix (3), and a diffusion barrier (4) provided between the stabilizer (5) and the matrix (3) for preventing diffusion of superconductive com- poundforming element in the matrix (3) from diffusion into the stabilizer (5) during the diffusion reaction, and the coupling current induced between the intermetallic compound-based superconductive wire members can be reduced by the provision of the metal layer (7) of high melting point and high resistance. Furthermore, the superconductive parts can be formed by heat treatment, and the AC loss can be reduced thereby.
摘要:
For a magnetic shield a solution for a designable time-constant shall be implemented. This is achieved by a compound material for a magnetic shield of a magnetic resonance (MR) imaging system the compound material comprising fragmented superconducting material (2), wherein the fragmented superconducting material (2) comprises fibers or wires (4), wherein the fibers or wires (4) of the fragmented superconducting material (2) are dispersed in a normal conducting metal or alloy (3). The present invention also refers to a magnetic shield for a magnetic resonance (MR) imaging system, wherein at least one surface of the magnetic shield (1) is covered with such a compound material. The present invention also refers to a magnetic resonance (MR) imaging system comprising such a magnetic shield and to a method for producing a compound material for a magnetic shield of a magnetic resonance (MR) imaging system.
摘要:
A method of manufacturing an insulated superconducting wire material comprising the steps of: removing a flux (S01) by heating a superconducting wire material at a temperature equals to or higher than a flux volatilization temperature and equals to or lower than a heatproof temperature of the superconducting wire material, the superconducting wire material comprising a channel with a channel groove and a superconducting core wire material accommodated in the channel groove of the channel, and the channel groove and the superconducting core wire material being bonded with a solder including the flux; and forming an insulated superconducting wire material (S02) of forming an insulating film on a surface of the superconducting wire material.