a nb 3 Repair method of sn superconducting wire

A repair method, superconducting wire technology, applied in the usage of superconducting elements, superconducting magnets/coils, superconducting devices, etc., can solve the problem of destroying the superconducting performance of superconducting magnets, damaged wires, and the difficulty of regenerating Sn superconducting magnets. Use and other issues

Active Publication Date: 2021-04-27
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nb 3 The superconducting joint of Sn is the vulnerable point of the whole magnet, meanwhile, the Nb 3 The outermost wire of the Sn magnetic field may also be damaged by external force, and the Nb 3 Damaged Sn superconducting wires will destroy the superconducting properties of the entire superconducting magnet, while Nb 3 Sn superconducting magnets are hard to reuse

Method used

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  • a nb <sub>3</sub> Repair method of sn superconducting wire
  • a nb <sub>3</sub> Repair method of sn superconducting wire
  • a nb <sub>3</sub> Repair method of sn superconducting wire

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Nb that will have the point of failure 3 The Sn superconducting wire was cut into a fracture with a wedge angle of 15° with scissors. The copper layer at the end of a NbTi superconducting wire is etched with nitric acid to expose the NbTi superconducting multifilament. Take a piece of Nb rod, drill a counterbore in the center of the Nb rod, the diameter of the hole is 1 mm, insert the NbTi multi-wire into the center hole of the Nb rod, put the Nb rod together with the NbTi superconducting wire under the press and press it horizontally, the pressure of the press is 10t, NbTi multifilaments embedded in Nb rods. Then holes are drilled on the Nb rod near the NbTi multifilament. Put the Nb rod into the copper cup, punch a hole in the center of the bottom of the copper cup, and the center hole of the copper cup is coaxial with the through hole of the Nb rod. Ball mill the Nb powder and Sn powder for 2 hours, the molar ratio of Nb powder and Sn powder is 1:1, and the partic...

Embodiment 2

[0045] will destroy Nb 3 The Sn superconducting wire was cut with scissors into a fracture with a wedge-shaped angle of 30°. The copper layer at the end of a NbTi superconducting wire is etched with nitric acid to expose the NbTi superconducting multifilament. Take a piece of Nb rod, drill a counterbore in the center of the Nb rod, the diameter of the hole is 5mm, and insert the NbTi multi-wire into the center hole of the Nb rod. Put the Nb rod together with the NbTi superconducting wire under a press and press it horizontally. The pressure of the press is 2t, so that the NbTi multifilaments are embedded in the Nb rod. Then holes are drilled on the Nb rod near the NbTi multifilament. Put the Nb rod into the copper cup, punch a hole in the center of the bottom of the copper cup, and the center hole of the copper cup is coaxial with the through hole of the Nb rod. The Nb powder and the Sn powder were ball milled for 20 hours, the molar ratio of the Nb powder and the Sn powder...

Embodiment 3

[0047] will destroy Nb 3 The Sn superconducting wire was cut into a fracture with a wedge angle of 22° with scissors. The copper layer at the end of a NbTi superconducting wire is etched with nitric acid to expose the NbTi superconducting multifilament. Take a piece of Nb rod, drill a counterbore in the center of the Nb rod, the diameter of the hole is 2.5mm, insert the NbTi multi-wire into the center hole of the Nb rod, put the Nb rod together with the NbTi superconducting wire under the press and press it horizontally, the press The pressure is 6t, so that the NbTi multifilaments are embedded in the Nb rod. Then holes are drilled on the Nb rod near the NbTi multifilament. Put the Nb rod into the copper cup, and punch a hole in the center of the bottom of the copper cup, which is coaxial with the through hole of the Nb rod. Mix Nb powder and Sn powder, ball mill for 10h, the molar ratio of Nb powder and Sn powder is 3:1, and the particle size of Nb powder and Sn powder is ...

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Abstract

a kind of Nb 3 The repair method of Sn superconducting wire, by adding Nb 3 Sn superconducting wires are connected with NbTi superconducting wires to form a superconducting junction and recover Nb with damage points 3 Superconducting properties of Sn superconducting wires. The superconducting connector is a hollow cylindrical structure, including Cu layer, Nb 3 Sn wire, Nb 3 Sn sintered bulk, Nb and NbTi superconducting wires. Cu layer on the outermost layer, Nb 3 Sn sintered bulk and Nb are concentric cylindrical structures, Nb 3 The Sn sintered body is an outer cylinder, and the Nb is an inner cylinder. Nb 3 The Sn wire is located on the Nb of the outer cylinder 3 In the Sn bulk, NbTi is located in the Nb rods of the inner cylinder.

Description

technical field [0001] The present invention relates to a kind of Nb 3 Repair method of Sn superconducting wire. Background technique [0002] With the rapid development of superconducting technology, there is an increasing demand for superconducting magnets, especially superconducting magnets that can provide strong magnetic fields. Nb 3 Sn superconducting magnet is currently the most widely used high-field low-temperature superconducting magnet, and is an ideal choice for preparing a strong magnetic field above 10T. Nb 3 Sn superconductor and NbTi superconductor are the most common low-temperature superconductors, the critical temperature of NbTi superconductor is greater than 9K, and the NbTi superconductor 3 The superconducting critical temperature of Sn is greater than 18K. Using NbTi superconducting magnets and Nb 3 The critical magnetic field of a Sn superconducting magnet, the Nb 3 Inserting the Sn superconducting magnet into the NbTi superconducting magnet ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B12/10H01B13/00H01F6/06H01F41/04
CPCH01B12/10H01B13/00H01B13/0016H01F6/06H01F41/048Y02E40/60
Inventor 孙万硕王秋良程军胜戴银明胡新宁王晖刘建华
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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