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Improved Nb3Al precursor wire and preparation method thereof

A precursor and improved technology, which is applied in the field of improved Nb3Al precursor wire and its preparation, can solve the problems of low wire yield and high process equipment requirements

Pending Publication Date: 2021-07-30
合肥夸夫超导科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In order to improve the existing Nb 3 The superconducting current-carrying performance of Al wires, while solving the problems of low wire yields and high requirements for process equipment in the existing preparation process, the purpose of the present invention is to provide an improved Nb 3 Al precursor wire structure and its preparation method, the method is simple in process and easy to popularize, in the case of effectively increasing the current-carrying area of ​​the wire superconducting layer, it can also better improve the wire yield and reduce the production cost of the wire

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] An improved Nb 3 The preparation method of Al precursor wire rod structure, it specifically comprises the following steps:

[0026] (1) Fabrication of Nb-Al composite rods: After stacking 0.01 mm thick Nb foil and 0.003 mm thick Al foil without a center Nb rod, it is manually wound into a Nb-Al composite rod with a diameter of 8 mm, and the center position is minimized The gap, the width of both Nb foil and Al foil is 200 mm;

[0027] (2) Making hexagonal composite rods: put the above-mentioned Nb-Al composite rods with a diameter of 8 mm into a Ta tube with an outer diameter of 10 mm and a wall thickness of 1.0 mm to obtain a Ta / Nb-Al composite; The Ta / Nb-Al composite is processed into a hexagonal Ta / Nb-Al single mandrel with a distance across sides of 3.0 mm;

[0028] (3) Making multi-core composite wires: 18 hexagonal Ta / Nb-Al single mandrels with a length of 2.0 m and 1 central Nb rod of the same size were packed into Cu with Ta barrier layer in the closest arrang...

Embodiment 2

[0031] An improved Nb 3 The preparation method of Al precursor wire rod structure specifically comprises the following steps:

[0032] (1) Fabrication of Nb-Al composite rod: After stacking 0.1 mm thick Nb foil and 0.03 mm thick Al foil without a center Nb rod, it is manually wound into a Nb-Al composite rod with a diameter of 8 mm, and the center position is minimized The gap, the width of both Nb foil and Al foil is 150 mm;

[0033](2) Making hexagonal composite rods: put the above-mentioned Nb-Al composite rods with a diameter of 8 mm into a Ta tube with an outer diameter of 10 mm and a wall thickness of 1.0 mm to obtain a Ta / Nb-Al composite; The manufacturing method processes the Ta / Nb-Al composite body into a hexagonal Ta / Nb-Al single mandrel with a distance across sides of 1.0 mm;

[0034] (3) Making multi-core composite wires: put 1000 hexagonal Ta / Nb-Al single mandrels with a length of 300 mm and 100 central Nb rods of the same size into the Ta-containing barrier lay...

Embodiment 3

[0037] An improved Nb 3 The preparation method of Al precursor wire rod specifically comprises the following steps:

[0038] (1) Fabrication of Nb-Al composite rods: After stacking 0.5 mm thick Nb foil and 0.15 mm thick Al foil without a center Nb rod, it is manually wound into a Nb-Al composite rod with a diameter of 8.0 mm, and the center position is minimized Void; the width of both Nb foil and Al foil is 300 mm;

[0039] (2) Fabrication of hexagonal composite rods: put the above-mentioned Nb-Al composite rods with a diameter of 8.0 mm into a Ta tube with an outer diameter of 10 mm and a wall thickness of 1.0 mm to form a Ta / Nb-Al composite; The manufacturing method is to process the Ta / Nb-Al composite body into a hexagonal Ta / Nb-Al single mandrel with a distance across sides of 10.0 mm;

[0040] (3) Making multi-core composite wires: put 10 Ta / Nb-Al single mandrels with a length of 3.0 m and hexagonal shape above and 9 central Nb rods of the same size into the Ta-contain...

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Abstract

The invention discloses an improved Nb3Al precursor wire and a preparation method thereof, and the preparation method comprises the following steps: self-winding Nb foil and Al foil into an Nb-Al composite rod by adopting a mode without a center Nb rod; putting the Nb-Al composite rod into a Ta tube, and machining a Ta / Nb-Al single-core rod through a groove rolling method; loading the Ta / Nb-Al single-core rod and the center Nb rod into a secondary composite Cu-Ni wrapping pipe containing a Ta or Nb barrier layer; finally, processing the complex into a wire rod by an extrusion or drawing method, and obtaining the high-quality multi-core Nb3Al precursor wire rod. The Nb3Al wire prepared by the method is not easy to break in the plastic processing process, and various performance indexes of the Nb3Al wire prepared by the method are equivalent to those of a wire prepared by a conventional method, so that the yield of the wire is higher, and the preparation cost of the wire is lower.

Description

technical field [0001] The invention belongs to the technical field of superconducting materials, in particular to an improved Nb 3 Al precursor wire and its preparation method. Background technique [0002] Due to better stress-strain tolerance characteristics, excellent high-field current-carrying density performance, niobium trialuminum (Nb 3 Al) low-temperature superconductor, considered to be the future niobium-tritin (Nb 3 Sn) is a substitute material for superconductors; it has great potential in the application of high-field superconducting magnets in many fields such as high-energy particle accelerators with a magnetic field strength of 15 T (Tesla), nuclear magnetic resonance spectrometers (NMR), and magnetic confinement nuclear fusion (ITER). Great business potential. [0003] Currently, high current-carrying density Nb 3 Sn superconducting wires are usually prepared by the inner tin method, but the inner tin method Nb 3 In the engineering application of Sn w...

Claims

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Application Information

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IPC IPC(8): H01B12/02
CPCH01B12/02Y02E40/60
Inventor 潘熙锋
Owner 合肥夸夫超导科技有限公司
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