Method for manufacturing composite Nb3Al/Nb multi-core superconducting wire

A technology for superconducting wires and wires, which is applied in the usage of superconducting elements, cable/conductor manufacturing, superconducting devices, etc. Difficult to control and other problems, to achieve the effects of stable and excellent superconductivity, convenient control of heating temperature and time, and overall compactness and uniformity

Inactive Publication Date: 2012-07-04
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the reduction of the liquid Ga level and the bending or vibration of the wire will prolong the heating time, even if the ohmic heating current remains unchanged, the maximum temperature obtained by the wire cannot be guaranteed (T max ) unchanged, the synthesized Nb 3 The performance of Al / Nb wire is also not guaranteed
It can be seen that the RHQT method has complex process, long cycle, low efficiency, difficult to control the reaction conditions, and the synthesized Nb 3 The uniformity or consistency of Al / Nb wire properties is difficult to guarantee

Method used

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  • Method for manufacturing composite Nb3Al/Nb multi-core superconducting wire
  • Method for manufacturing composite Nb3Al/Nb multi-core superconducting wire
  • Method for manufacturing composite Nb3Al/Nb multi-core superconducting wire

Examples

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Embodiment 1

[0019] A specific embodiment of the present invention is that a kind of Nb 3 The preparation method of Al / Nb multi-core composite superconducting wire rod, its concrete steps are:

[0020] a. Press Nb 3 Stoichiometric ratio of Al Weigh Nb foil and Al foil; overlap and wind the weighed Nb foil and Al foil on a 10Nb rod to form a wound rod; then put the wound rod into the Nb tube; pull the Nb tube into a thin wire with a diameter of 0.8mm, that is, to obtain a single-core wire;

[0021] b. Cut the single-core wire obtained in step a into 132 sections of equal length; then neatly pack these equal-length single-core wires into the Nb tube, and place a single-core wire on the central axis of the Nb tube Nb rods of the same length as the wire rod; then drawing and rolling the Nb tube into a round or flat wire rod with a diameter of 1.2mm, that is, a multi-core wire rod;

[0022] c. Cut the multi-core wire obtained in step b into a short wire with a length of 10 cm, and use a puls...

Embodiment 2

[0027] This example is basically the same as Example 1, the difference is:

[0028] Use a pulse power supply to treat the short wire at a high temperature of 1900 ° C for 0.2 seconds under vacuum conditions to obtain Nb 3 Al / Nb multi-core composite superconducting wire. Experimentally measured, the Nb prepared in this example 3 The superconducting transition temperature of Al / Nb multi-core composite superconducting wire is 16.5K.

Embodiment 3

[0030] This example is basically the same as Example 1, the difference is only:

[0031] Use a pulse power supply to treat the short wire at a high temperature of 2100 ° C for 0.05 seconds under vacuum conditions to obtain Nb 3 Al / Nb multi-core composite superconducting wire. Experimentally measured, the Nb of this example 3 The superconducting transition temperature of Al / Nb multi-core composite superconducting wire is 16.8K.

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Abstract

The invention discloses a method for manufacturing a composite Nb3Al/Nb multi-core superconducting wire. The method comprises the following steps of: weighting Nb foil and Al foil based on a stoichiometric ratio of the Nb3Al; superposing the Nb foil and the Al foil and winding the Nb foil and the Al foil around a Nb rod, placing the Nb rod into a Nb tube, and drawing the Nb tube to a thin line of0.8-1mm to obtain a single-core wire; orderly placing the sections of the single-core wire into the Nb tube after cutting off the single-core wire to be multiple equal-length sections, and placing anequal-length Nb rod on the central axial line of the Nb tube; drawing and rolling the Nb tube to a circular or flat wire with the diameter of 1-2.5mm to obtain a multi-core wire; and cutting off the multi-core wire to short wires of 10cm, and carrying out a high-temperature treatment of 1900-2100 DEG C on the short wires for 0.05-0.2s by utilizing a pulse electric power under a vacuum condition to obtain the composite Nb3Al/Nb multi-core superconducting wires. The method disclosed by the invention has the advantages of short manufacturing period and high efficiency; in addition, the compositeNb3Al/Nb multi-core superconducting wire manufactured by the method has the advantages of compact connection, good uniformity, no separation situation, no impurity phase, and excellent superconducting performance.

Description

technical field [0001] The invention relates to the field of superconducting materials, in particular to a kind of Nb 3 A method for preparing Al / Nb multi-core composite superconducting wires. Background technique [0002] Nb 3 Nb in Al / Nb Composite Superconducting Materials 3 The Al superconducting phase has a high critical temperature (superconducting transition temperature), a high critical magnetic field, and a high critical current density under a high magnetic field; the Nb part of it plays a supporting role during preparation, which is convenient for preparation. In the prepared material, Nb Some can improve the mechanical properties of the material and have very good strain resistance. It is considered an alternative to Nb 3 Sn is the best superconducting material for large-scale applications under high magnetic fields, such as applications in nuclear fusion, high-energy particle accelerators, and nuclear magnetic resonance analyzers. Currently, for Nb 3 The pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/00H01B12/00
CPCY02E40/64Y02E40/60
Inventor 赵勇陈永亮张勇冯勇闫果李来风
Owner SOUTHWEST JIAOTONG UNIV
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