A kind of preparation method of nb3al superconducting joint

A technology of superconducting joints and joint tubes, applied in the direction of connecting contact materials, connections, electrical components, etc., can solve problems such as unstable quality, complex and harsh process conditions, etc., and achieve the effect of reducing joint resistance

Active Publication Date: 2016-01-06
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the invention is to overcome prior art Nb 3 In the preparation technology of Al superconducting wires and superconducting joints, there are problems such as unstable quality and complex and harsh process conditions. A new Nb 3 Preparation method of Al superconducting wire joint

Method used

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  • A kind of preparation method of nb3al superconducting joint
  • A kind of preparation method of nb3al superconducting joint
  • A kind of preparation method of nb3al superconducting joint

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Experimental program
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Effect test

Embodiment 1

[0038] Preparation of Nb 3 Al superconducting joints. First, pure Nb powder and pure Al powder are mixed together according to the atomic number ratio of 3:1, the powder particle size is 20 microns, and the powder mass after mixing is 200 grams in total; the pure Nb powder, pure Al powder, and 5 grams of sodium stearate powder and 3000 grams of agate material grinding balls are put into the agate material ball mill jar of planetary ball mill together and carry out high-energy ball milling. The high-energy ball milling process is carried out in a vacuum environment, and the vacuum degree is less than or equal to 1×10 -2 Pa. Figure 6 In order to prepare high energy ball milled Nb by planetary ball milling 3 Schematic diagram of the principle of Al supersaturated solid solution powder. After the ball milling is completed, put the ball mill jar into a vacuum glove box, take out the ball-milled Nb-Al supersaturated solid solution powder in a vacuum environment, and dry and sto...

Embodiment 2

[0041] Preparation of Nb 3 Al superconducting joints. First mix Nb-20at% Al alloy powder and pure Al powder together, so that the atomic ratio of Nb and Al in the two powders reaches 3:1. Both powders have a particle size of 200 microns and a total mass of 200 grams; put Nb-20at% Al alloy powder and pure Al powder together with 5 grams of dispersant sodium stearate powder and 3000 grams of agate material grinding balls and stir High-energy ball milling was carried out in the agate material ball milling tank of the type ball mill. Figure 7 In order to prepare high energy ball milled Nb by stirring ball milling 3 Schematic diagram of the principle of Al supersaturated solid solution powder. After the ball milling, put the ball mill jar into a vacuum glove box, take out the ball milled Nb-Al supersaturated solid solution powder, vacuum seal it and store it dry. Remove Nb 3 Shell material of Al superconducting wire precursor. In the vacuum glove box, take the Nb-Al supersat...

Embodiment 3

[0044] Preparation of Nb 3 Al superconducting joints. First, pure Nb powder and pure Al powder are mixed together according to the atomic number ratio of 3:1, the particle size of the powder is 100 microns, and the total mass is 200 grams; the pure Nb powder, pure Al powder, and dispersant stearic acid 5 grams of sodium powder and 3000 grams of corundum material grinding balls are put into the corundum material ball mill jar of the vibratory ball mill together for high-energy ball milling. Figure 8 In order to prepare high energy ball milled Nb by vibratory ball milling 3 Schematic diagram of the principle of Al supersaturated solid solution powder. After the ball milling, put the ball mill jar into a vacuum glove box, take out the ball milled Nb-Al supersaturated solid solution powder, vacuum seal it and store it dry. Remove Nb 3 Shell material of Al superconducting wire precursor. In the vacuum glove box, take the Nb-Al supersaturated solid solution powder and the supe...

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Abstract

The invention discloses a Nb3Al superconductive connector preparation method, which comprises the steps: selecting raw material powder of which components comprise pure Nb and pure Al, or Nb-Al alloy and pure Al; preparing Nb-Al supersaturated solid solution alloy powder with the selected raw material powder in a high energy ball-milling method; loading the Nb-Al supersaturated solid solution alloy powder and the end part of supersaturated solid solution Nb3Al superconductive wire precursor to be connected into a connector tube, and pre-pressing the powder; then performing heat treatment on the whole connector tube and the Nb3Al superconductive wire precursor together. The Nb3Al superconductive connector is prepared after the heat treatment is finished.

Description

technical field [0001] The invention relates to a superconducting wire connection method, in particular to a Nb suitable for the rapid heating, rapid cooling and quenching transformation method. 3 A method for preparing a superconducting joint of an Al superconducting wire. Background technique [0002] High-field superconducting magnets play irreplaceable important applications in technical fields such as nuclear magnetic resonance, ITER thermonuclear fusion, and high-energy physics accelerators. In the existing superconducting magnet preparation technology, magnets of 10T and below are made of NbTi alloy superconducting wire with excellent mechanical ductility. Due to the low critical magnetic field of NbTi alloys, higher magnetic fields above 10T require the use of A-15 type intermetallic compound superconducting materials with higher critical magnetic field characteristics to build magnets. The existing 10-20T magnets mostly use NbTi alloys made of low-temperature supe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01R43/00H01R4/68
Inventor 程军胜王秋良刘建华戴银明朱光胡新宁周峰
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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