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A preparation method of composite sheathed iron-based superconducting wire

An iron-based superconducting and sheathing technology, which is applied in the usage of superconducting elements, superconducting devices, cable/conductor manufacturing, etc., can solve the problems of plugs being easily broken

Active Publication Date: 2021-08-27
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 present invention is to provide a method for preparing a composite sheathed iron-based superconducting wire, which solves the problem that the plug is easily broken during the cold drawing process, and is beneficial to the subsequent sealing treatment of the end of the wire

Method used

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  • A preparation method of composite sheathed iron-based superconducting wire

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Embodiment 1

[0028] (1) Take a piece with a length of 10 cm and an outer diameter of 5 mm, which is made of pure silver metal as the sheath material, and contains BaFe doped with K element 2 As 2 The wire rod of the iron-based superconducting material is packed into a pure copper metal tube with a length of 16 cm, an outer diameter of 8 mm, and a wall thickness of 1.5 mm.

[0029] (2) Use a mechanical clamping device to make the iron-based superconducting wire closely adhere to the inner wall of the pure copper metal tube at 1 cm from both ends.

[0030] (3) In an argon atmosphere inert gas glove box, use pure copper metal powder to fill both ends of the pure copper metal tube, the filling length is 2 cm, and the filled metal powder part is close to the end surface of the iron-based superconducting wire without gaps.

[0031] (4) Put two cylindrical pure tin metal plugs with an outer diameter of 5 mm and a length of 1 cm into the two ends of the pure copper metal tube, so that the inner e...

Embodiment 2

[0036] (1) 7 pieces with a length of 10 cm and an outer diameter of 2.55 mm are made of pure silver metal as the sheath material, and the composition is BaFe doped with K element 2 As 2 The wire rod of the iron-based superconducting material is packed into a copper-nickel alloy metal tube with a length of 16 cm, an outer diameter of 10 mm, and a wall thickness of 1 mm.

[0037] (2) Use a mechanical clamping device to make the iron-based superconducting wire closely adhere to the inner wall of the copper-nickel alloy metal tube at 1 cm from both ends.

[0038] (3) In an argon atmosphere inert gas glove box, use pure copper metal powder to fill both ends of the copper-nickel alloy metal tube, the filling length is 2 cm, and the filled metal powder part is tightly connected to the end surface of the iron-based superconducting wire without gaps.

[0039] (4) Put two cylindrical pure tin metal plugs with an outer diameter of 8 mm and a length of 1 cm into the two ends of the coppe...

Embodiment 3

[0044] (1) The length of 19 pieces is 16 cm, the outer diameter is 2.50 mm, and the silver-manganese alloy is used as the sheath material, and the composition is SrFe doped with Na element. 2 As 2 The wire rod of the iron-based superconducting material is packed into a pure iron metal tube with a length of 20 cm, an outer diameter of 15 mm, and a wall thickness of 1 mm.

[0045] (2) A mechanical clamping device is used to make the iron-based superconducting wire closely adhere to the inner wall of the pure iron metal tube at 1 cm from both ends.

[0046] (3) In an argon atmosphere inert gas glove box, use pure iron metal powder to fill both ends of the pure iron metal tube, the filling length is 2 cm, and the filled metal powder part is tightly connected to the end surface of the iron-based superconducting wire without gaps.

[0047] (4) Put 2 cylindrical pure lead metal plugs with an outer diameter of 13 millimeters and a length of 2 centimeters into the two ends of the pure...

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Abstract

The invention relates to a preparation method of a composite sheathed iron-based superconducting wire, comprising: step 1, compounding one or several pure silver or silver alloy sheathed iron-based superconducting wires into a high-strength metal tube; step 2, Use mechanical clamps to tightly fit the two ends of the superconducting wire to the inner wall of the metal tube; step 3, fill the metal powder into the two ends of the metal tube; step 4, install low-hardness metal plugs on both sides of the metal powder in the metal tube; step 5. Process the assembled complex into wire rods by swaging, drawing and other cold processing techniques; step 6, cut off the metal plugs at both ends of the wire rods, and seal the two ends of the wire rods by heating and melting or arc welding. The invention can effectively avoid the fracture of the end of the wire due to the large difference in material hardness during the cold working process, and avoid the element loss of the superconducting material during the subsequent heat treatment of the wire.

Description

technical field [0001] The invention relates to a preparation method of a composite sheathed iron-based superconducting wire. Background technique [0002] Iron-based superconducting materials are new high-temperature superconducting materials following the copper oxide superconductor discovered in 1986. According to the composition ratio and crystal structure of the parent compound, iron-based superconducting materials include several different types, among which the 1111 system (as SmFeAsO 1-x f x Represented) and 122 system (represented by Ba 1-x K x Fe 2 As 2 and Sr 1-x K x Fe 2 As 2 The iron-based superconductors represented by ) have relatively high superconducting transition temperatures (currently the highest are 58K and 38K respectively), and the upper critical fields of both can exceed 100T, and have small anisotropy at the same time. The internal critical current density exceeds 10 6 A / cm 2 , these excellent physical properties show that iron-based sup...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B13/00H01B12/02
CPCH01B12/02H01B13/00Y02E40/60
Inventor 姚超马衍伟刘世法郭文文
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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