CN115295243B - Preparation method of element-doped high-critical-current-density niobium-tin superconducting strand - Google Patents

Preparation method of element-doped high-critical-current-density niobium-tin superconducting strand Download PDF

Info

Publication number
CN115295243B
CN115295243B CN202211219192.6A CN202211219192A CN115295243B CN 115295243 B CN115295243 B CN 115295243B CN 202211219192 A CN202211219192 A CN 202211219192A CN 115295243 B CN115295243 B CN 115295243B
Authority
CN
China
Prior art keywords
single core
core rod
superconducting strand
oxide
critical current
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202211219192.6A
Other languages
Chinese (zh)
Other versions
CN115295243A (en
Inventor
王春光
李鹏举
武博
郭强
刘向宏
杜予晅
冯勇
张平祥
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Western Superconducting Technologies Co Ltd
Original Assignee
Western Superconducting Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Western Superconducting Technologies Co Ltd filed Critical Western Superconducting Technologies Co Ltd
Priority to CN202211219192.6A priority Critical patent/CN115295243B/en
Publication of CN115295243A publication Critical patent/CN115295243A/en
Application granted granted Critical
Publication of CN115295243B publication Critical patent/CN115295243B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B12/00—Superconductive or hyperconductive conductors, cables, or transmission lines
    • H01B12/02—Superconductive or hyperconductive conductors, cables, or transmission lines characterised by their form
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment

Landscapes

  • Superconductors And Manufacturing Methods Therefor (AREA)

Abstract

The invention discloses a preparation method of an element-doped niobium-tin superconducting strand with high critical current density, which comprises the following steps: placing Nb-X-Y into a copper pipe, and processing to obtain a Cu/Nb-X-Y single core rod; loading oxide powder into a copper pipe, and treating to obtain a Cu/oxide single core rod; pouring molten Sn into an oxygen-free copper cylinder to obtain a Cu/Sn blank, and performing multi-pass cold precision forging, drawing and forming to obtain a Cu/Sn single core rod; loading a Cu/Nb-X-Y single core rod and a Cu/oxide single core rod cluster into a copper pipe, and obtaining an Nb module through drawing and forming; and (3) packing the Nb module and the Cu/Sn single core rod cluster into a Ta tube, then packing into a copper tube, and drawing for multiple times. The Nb-X-Y alloy and an oxygen source are separated and processed, and oxide particles generated after heat treatment can refine Nb 3 The Sn crystal grains are simultaneously used as pinning centers, so that the Nb is obviously improved 3 Critical current density of the Sn superconducting strand.

Description

Preparation method of element-doped high-critical-current-density niobium tri-tin superconducting strand
Technical Field
The invention belongs to the technical field of superconducting material processing, and particularly relates to a preparation method of an element-doped high-critical-current-density niobium tri-tin superconducting strand.
Background
Nb 3 The Sn superconducting wire is a key material for preparing magnets and has wide application in the aspects of large scientific devices, civil medical imaging and the like. How to further increase Nb 3 The critical current density of Sn wire is an important direction for wire development. Nb with the most excellent performance prepared according to the traditional process flow 3 Sn wire has also severely restricted people from obtaining magnets with higher magnetic fields and lower costs.
Nb 3 The current carrying capacity of the Sn superconducting wire depends on its pinning force density. Nb 3 Sn is mainly pinned by grain boundaries, and the density of pinning centers can be increased by reducing the grain size of Sn within a certain range, so that Nb is improved 3 Critical current density of Sn. Reduction of Nb 3 One method of Sn grains is to introduce second phase oxide particles to form Nb during heat treatment 3 The process of Sn prevents the combination of grain boundaries and enlarges nucleation centers. The manner in which the oxide particles of the second phase are introduced is currently the major difficulty faced. The direct introduction of oxide particles into the Nb matrix significantly increases the hardness thereof, making it difficult to process long wires.
Disclosure of Invention
The invention aims to provide a preparation method of an element-doped niobium-tin superconducting strand with high critical current density, which can avoid oxide particles from being generated in the preparation process of the strand while ensuring the high critical current density of the strand and improve the processing reliability of the strand.
The technical scheme adopted by the invention is that the preparation method of the element-doped high-critical-current-density niobium tri-tin superconducting strand is implemented according to the following steps:
step 1, putting an Nb-X-Y alloy rod into a Cu pipe, and performing welding, hot extrusion, drawing, forming and cutting to length to obtain a Cu/Nb-X-Y single core rod;
2, filling oxide powder into a Cu tube, and carrying out rotary forging, drawing, forming and cutting to length to obtain a Cu/oxide single core rod;
step 3, pouring the molten Sn into an oxygen-free copper cylinder to obtain a Cu/Sn blank, and then performing multi-pass cold precision forging, drawing, forming and cutting to length to obtain a Cu/Sn single core rod;
step 4, assembling the Cu/Nb-X-Y single core rod and the Cu/oxide single core rod in an oxygen-free copper pipe in a hexagonal close packing manner, and performing drawing, forming and fixed length cutting to obtain an Nb module;
and 5, assembling the Nb modules and the Cu/Sn single core rods in a Ta tube in a hexagonal close packing manner to ensure that six Cu/Sn single core rods are arranged around each Nb module, penetrating the assembled Ta tube through an oxygen-free copper tube to obtain a niobium three-tin superconducting strand blank, and performing multi-pass drawing to obtain the element-doped niobium three-tin superconducting strand with ultrahigh critical current density.
The present invention is also characterized in that,
in the step 1, the doping amount of X in the Nb-X-Y alloy rod is 0.5at.% to 5at.%, and the doping amount of Y is 0.5at.% to 4at.%; x is Ta or Ti; y is Hf or Zr.
In the step 1, the Cu/Nb-X-Y single core rod has a copper ratio of 0.15-0.2 and a size of H3.5mm-H6.0mm.
In step 2, the oxide powder is SnO 2 Powder or CuO powder; the copper ratio of the Cu/oxide single core rod is 0.1-0.2, and the size of the Cu/oxide single core rod is H3.5mm-H6.0 mm.
In the step 3, the copper ratio of the Cu/Sn single core rod is between 0.2 and 0.5, and the size is between H3.5mm and H6.0mm.
In the step 4, the number ratio of the Cu/Nb-X-Y single core rods to the Cu/oxide single core rods is controlled to be 8-18, and the Cu/oxide single core rods are ensured to be uniformly distributed in the Nb module.
The cross sections of the Cu/Nb-X-Y single core rod, the Cu/oxide single core rod, the Cu/Sn single core rod and the Nb module are all hexagonal.
In the step 5, the copper ratio of the niobium-tin superconducting strand blank is between 0.5 and 2.
The invention has the beneficial effects that: by adding trace element Y into Nb and introducing oxide insertion rods around Cu/Nb-X-Y single core rods, oxide particles of Y are generated in the heat treatment phase forming process of the niobium three-tin superconducting strand, and Nb is refined 3 Introducing a point pinning center at the same time of Sn crystal grains; adding trace element X into Nb to replace Nb 3 And the critical magnetic field of the corresponding position in the Sn crystal lattice is improved, and the critical current density of the niobium tristin wire is greatly improved. According to the invention, the final blank is obtained by adopting the method of assembling the Nb module, the Cu/Sn single core rod and the Ta pipe, the oxide inserted rod is not subjected to hot processing in the Nb module and the preparation process of the blank, oxide particles are prevented from being generated in the preparation process of the wire, and the processing of the wire is ensuredAnd (4) sex.
Drawings
FIG. 1 is an Nb of the present invention 3 A cross-sectional view of the final billet of Sn superconducting strand;
FIG. 2 is an assembled schematic view of an Nb module of the present invention;
FIG. 3 shows Nb produced by heat-treating a niobium-tin superconducting strand in example 1 of the present invention 3 A morphology map of Sn grains;
FIG. 4 is a graph showing the critical current test of the niobium-tin superconducting strand of example 1 of the present invention;
FIG. 5 shows Nb formed by heat-treating a niobium-tin superconducting strand in example 2 of the present invention 3 A morphology map of Sn grains;
fig. 6 is a critical current test graph of the niobium tri-tin superconducting strand in example 2 of the invention;
FIG. 7 shows Nb obtained by heat-treating a niobium-tin superconducting strand in example 3 of the present invention 3 A morphology map of Sn grains;
fig. 8 is a critical current test graph of the niobium tri-tin superconducting strand in example 3 of the present invention.
In the figure, 1 is an oxygen-free copper pipe, 2 is a Ta pipe, 3 is a Nb module, 3-1 is a Cu/Nb-X-Y single core rod, 3-2 is a Cu/oxide single core rod, and 4 is a Cu/Sn single core rod.
Detailed Description
The invention is described in detail below with reference to the drawings and the detailed description.
The preparation method of the element-doped niobium-tin superconducting strand with high critical current density is implemented according to the following steps:
step 1, putting a Nb-X-Y alloy rod into a Cu pipe, and performing welding, hot extrusion, drawing, forming and cutting to length to obtain a Cu/Nb-X-Y single core rod 3-1;
wherein X and Y are trace doping elements, and X is Ta or Ti; y is Hf or Zr; the doping amount of X in the Nb-X-Y alloy rod is between 0.5at.% and 5at.%, and the doping amount of Y is between 0.5at.% and 4at.%;
the copper ratio of the Cu/Nb-X-Y single core rod is 3-1 is between 0.15 and 0.2, and the size is between H3.5mm and H6.0mm;
trace elementsThe effect of X is to increase Nb 3 Upper critical magnetic field of Sn; the trace element Y mainly acts on Nb 3 The Sn generates oxide particles with oxygen in the oxide plug during the heat treatment phase forming process to generate ultra-fine Nb 3 Sn crystal grains;
step 2, loading oxide powder into a Cu tube, and carrying out rotary forging, drawing, forming and cutting to length to obtain a Cu/oxide single core rod 3-2;
the oxide powder is SnO 2 Powder or CuO powder; the copper ratio of the Cu/oxide single core rod is 3-2 and is 0.1-0.2, and the size is H3.5mm-H6.0 mm;
the oxide powder is used for releasing oxygen into Nb-X-Y matrix during heat treatment to generate second-phase oxide particles, namely Nb during subsequent heat treatment 3 The phase formation of Sn provides nucleation centers and prevents coalescence of grain boundaries to produce ultra-fine Nb 3 Sn crystal grains;
step 3, pouring molten Sn into an oxygen-free copper cylinder to obtain a Cu/Sn blank, and then performing multi-pass cold precision forging, drawing, forming and fixed-length cutting to obtain a Cu/Sn single-core rod 4;
the copper ratio of the Cu/Sn single core rod 4 is between 0.2 and 0.5, and the size is between H3.5mm and H6.0mm;
step 4, assembling the Cu/Nb-X-Y single core rod 3-1 and the Cu/oxide single core rod 3-2 in an oxygen-free copper pipe in a hexagonal close packing manner, and obtaining an Nb module 3 through drawing, forming and cutting to length;
the quantity ratio of the Cu/Nb-X-Y single core rod 3-1 to the Cu/oxide single core rod 3-2 is controlled to be 8 to 18, and the Cu/oxide single core rod 3-2 is ensured to be uniformly distributed in the Nb module 3;
the copper ratio of the Nb module 3 is between 0.2 and 0.5, and the size is between H3.5mm and H6.0mm;
the cross sections of the Cu/Nb-X-Y single core rod 3-1, the Cu/oxide single core rod 3-2, the Cu/Sn single core rod 4 and the Nb module 3 are all hexagonal;
step 5, assembling the Nb modules 3 and the Cu/Sn single core rods 4 in the Ta tube 2 in a hexagonal close packing manner to ensure that six Cu/Sn single core rods are arranged around each Nb module 3, and then penetrating the assembled Ta tube through the oxygen-free copper tube 1 to obtain the niobium three-tin superconducting strand blankUltimate Nb 3 And (3) the copper ratio of the Sn blank is 0.5-2, and the element-doped niobium three-tin superconducting strand with ultrahigh critical current density is obtained through multi-pass drawing.
In the method, the Nb-X-Y alloy and the oxygen source are separated and processed, and oxide particles generated after heat treatment can refine Nb 3 The Sn crystal grains are simultaneously used as pinning centers, so that the Nb is obviously improved 3 Critical current density of the Sn superconducting strand. In addition, hot working is avoided in the preparation process from the Nb-X-Y alloy to the final finished product strand after the Nb-X-Y alloy is contacted with the oxygen source, the oxidation of the Nb-X-Y alloy is prevented, and the processing reliability of the wire rod is ensured.
Nb is produced after the superconducting strand of the invention is subjected to a special heat treatment system 3 Sn grain size less than 90nm and in Nb 3 The Sn crystal grains contain oxide particles of nanometer order. The special heat treatment system comprises two stages of medium temperature and high temperature. The heat preservation temperature of the medium-temperature stage is 400-585 ℃, oxygen in the oxide in the stage diffuses into the Nb-X-Y matrix, and simultaneously mutual diffusion of Sn and Cu is completed to achieve homogenization. The heat preservation temperature of the high-temperature stage is 620-700 ℃, and the temperature reaches Nb 3 The phase forming temperature of Sn, sn diffuses into Nb-X-Y alloy which is permeated by oxygen to generate ultra-fine Nb 3 Sn crystal grains.
Example 1
The preparation method of the element-doped high-critical-current-density niobium tri-tin superconducting strand is implemented according to the following steps:
step 1, preparing an Nb-4at.% Ta-1at.% Hf alloy rod by using a powder metallurgy method, loading the alloy rod into a copper pipe, and performing multi-pass drawing, forming and fixed length cutting to obtain a Cu/Nb-Ta-Hf single core rod; the copper ratio of the Cu/Nb-X-Y single core rod is 0.2;
step 2, loading CuO powder into a Cu tube, and carrying out rotary forging, drawing, forming and fixed-length cutting to obtain a Cu/CuO single core rod; the copper ratio of the Cu/oxide single core rod is 0.1;
step 3, pouring molten Sn into an oxygen-free copper cylinder to obtain a Cu/Sn blank, and then carrying out multi-pass cold precision forging, drawing, forming and fixed-length cutting to obtain a Cu/Sn single core rod;
step 4, assembling the Cu/Nb-Ta-Hf single core rod obtained in the step 1 and the Cu/CuO single core rod obtained in the step 2 in an oxygen-free copper pipe in a hexagonal close packing manner, and performing drawing, forming and fixed length cutting to obtain an Nb module;
the number of the Cu/Nb-Ta-Hf single core rods is 120, and the total number of the Cu/CuO single core rods is 7;
and 5, assembling the Cu/Sn single core rods obtained in the step 3 and the Nb modules obtained in the step 4 in a Ta tube in a hexagonal close packing manner, ensuring that 6 Cu/Sn single core rods are arranged around each Nb module, penetrating the assembled Ta tube through an oxygen-free copper tube to obtain a niobium three-tin superconducting strand blank, wherein the niobium three-tin superconducting strand blank comprises 84 Nb modules and 37 Cu/Sn single core rods, and obtaining the element-doped high-critical-current-density niobium three-tin superconducting strand with the diameter of 0.988mm through multi-pass drawing. Nb is formed after the superconducting strand is heat-treated 3 Sn has an average grain size of 70nm, as shown in FIG. 3, and a critical current Ic = 1376.7A at a temperature of 4.2K and a magnetic field of 12T, as shown in FIG. 4, corresponding to Jc = 3770.4A/mm 2 。
Example 2
The preparation method of the element-doped niobium-tin superconducting strand with high critical current density is implemented according to the following steps:
step 1, preparing an Nb-4at.% Ta-2at.% Hf alloy rod by using a powder metallurgy method, and filling the alloy rod into a copper pipe to obtain a Cu/Nb-Ta-Hf single core rod through multi-pass drawing, forming and cutting to length; the copper ratio of the Cu/Nb-Ta-Hf single core rod is 0.2;
step 2, loading CuO powder into a Cu tube, and carrying out rotary forging, drawing, forming and fixed-length cutting to obtain a Cu/CuO single core rod; the copper ratio of the Cu/CuO single core rod is 0.1;
step 3, pouring molten Sn into an oxygen-free copper cylinder to obtain a Cu/Sn blank, and then carrying out multi-pass cold precision forging, drawing, forming and cut to length to obtain a Cu/Sn single core rod;
step 4, assembling the Cu/Nb-Ta-Hf single core rod obtained in the step 1 and the Cu/CuO single core rod obtained in the step 2 in an oxygen-free copper tube in a hexagonal close packing manner, and obtaining an Nb module through drawing, forming and cutting to length;
the number of the Cu/Nb-Ta-Hf single core rods is 120, and the number of the Cu/CuO single core rods is 13;
step 5, assembling the Cu/Sn single core rods obtained in the step 3 and the Nb modules obtained in the step 4 in a Ta tube in a hexagonal close packing manner, ensuring that 6 Cu/Sn single core rods surround each Nb module, and then penetrating the assembled Ta tube through an oxygen-free copper tube to obtain a niobium three-tin superconducting strand blank, wherein the blank comprises 84 Nb modules and 37 Cu/Sn single core rods; the element-doped niobium three-tin superconducting strand with phi of 0.900mm and high critical current density can be obtained through multi-pass drawing. Nb is formed after the superconducting strand is heat-treated 3 Sn has an average grain size of 45nm, as shown in FIG. 5, and a critical current Ic = 1413.7A at a temperature of 4.2K and a magnetic field of 12T, as shown in FIG. 6, corresponding to Jc = 4555.5A/mm 2 。
Example 3
The preparation method of the element-doped high-critical-current-density niobium tri-tin superconducting strand is implemented according to the following steps:
step 1, preparing an Nb-4at.% Ta-1at.% Zr alloy rod by using a powder metallurgy method, and loading the alloy rod into a copper pipe to obtain a Cu/Nb-Ta-Zr single core rod through multi-pass drawing, forming and cutting to length; the copper ratio of the Cu/Nb-Ta-Zr single core rod is between 0.2;
step 2, loading CuO powder into a Cu tube, and carrying out rotary forging, drawing, forming and fixed-length cutting to obtain a Cu/CuO single core rod; the copper ratio of the Cu/CuO single core rod is 0.1;
step 3, pouring molten Sn into an oxygen-free copper cylinder to obtain a Cu/Sn blank, and then carrying out multi-pass cold precision forging, drawing, forming and cut to length to obtain a Cu/Sn single core rod;
step 4, assembling the Cu/Nb-Ta-Zr single core rod obtained in the step 1 and the Cu/CuO single core rod obtained in the step 2 in an oxygen-free copper tube in a hexagonal close packing manner, and obtaining an Nb module through drawing, forming and cutting to length;
the number of the Cu/Nb-Ta-Zr single core rods is 120, and the number of the Cu/CuO single core rods is 13;
step 5, the Cu/Sn single core rod obtained in the step 3 and the Nb module obtained in the step 4 are densely stacked in a hexagonal wayAnd assembling the components in a stacking mode in a Ta tube to ensure that 6 Cu/Sn single core rods are arranged around each Nb module, then penetrating the assembled Ta tube through an oxygen-free copper tube to obtain a niobium three-tin superconducting strand blank, wherein the blank comprises 84 Nb modules and 37 Cu/Sn single core rods, and the blank is subjected to multi-pass drawing to obtain the phi 0.800mm element-doped high-critical-current-density niobium three-tin superconducting strand. Nb is formed after the superconducting strand is heat-treated 3 Sn has an average grain size of 80nm, as shown in FIG. 7, and a critical current Ic = 809.1A at a temperature of 4.2K and a magnetic field of 12T, as shown in FIG. 8, corresponding to Jc = 3380.3A/mm 2 。
Example 4
The preparation method of the element-doped high-critical-current-density niobium tri-tin superconducting strand is implemented according to the following steps:
step 1, putting an Nb-X-Y alloy rod into a Cu pipe, and performing welding, hot extrusion, drawing, forming and cutting to length to obtain a Cu/Nb-X-Y single core rod;
x is Ti; y is Zr; the doping amount of X in the Nb-X-Y alloy bar is 5at.%, and the doping amount of Y is 4at.%; the copper ratio of the Cu/Nb-X-Y single core rod is 0.15, and the size is H6.0mm;
step 2, loading oxide powder into a Cu tube, and carrying out rotary forging, drawing, forming and cutting to length to obtain a Cu/oxide single core rod;
the oxide powder is SnO 2 Powder; the copper ratio of the Cu/oxide single core rod is 0.2, and the size is H6.0mm;
step 3, pouring the molten Sn into an oxygen-free copper cylinder to obtain a Cu/Sn blank, and performing multi-pass cold precision forging, drawing, forming and cutting to length to obtain a Cu/Sn single core rod;
the copper ratio of the Cu/Sn single core rod is 0.5, and the size is H6.0mm;
and 4, assembling the Cu/Nb-X-Y single core rod and the Cu/oxide single core rod in an oxygen-free copper pipe in a hexagonal close packing manner, and performing drawing, forming and cutting to length to obtain the Nb module.
The number ratio of the Cu/Nb-X-Y single core rods to the Cu/oxide single core rods is 8, and the Cu/oxide single core rods are ensured to be uniformly distributed in the Nb module; the Nb module has a copper ratio of 0.5 and a size of H6.0mm.
Step 5, assembling Nb modules and Cu/Sn single core rods in a Ta tube in a hexagonal close-packed mode to ensure that 6 Cu/Sn single core rods surround each Nb module, penetrating the assembled Ta tube through an oxygen-free copper tube to obtain a niobium three-tin superconducting strand blank, and finally, nb 3 And the copper ratio of the Sn blank is 2, and the element-doped niobium three-tin superconducting strand with ultrahigh critical current density is obtained through multi-pass drawing.

Claims (7)

1. The preparation method of the element-doped niobium-tin superconducting strand with high critical current density is characterized by comprising the following steps:
step 1, putting an Nb-X-Y alloy rod into a Cu pipe, and performing welding, hot extrusion, drawing, forming and cutting to length to obtain a Cu/Nb-X-Y single core rod;
the doping amount of X in the Nb-X-Y alloy rod is between 0.5at.% and 5at.%, and the doping amount of Y is between 0.5at.% and 4at.%; x is Ta or Ti; y is Hf or Zr;
step 2, loading oxide powder into a Cu tube, and carrying out rotary forging, drawing, forming and cutting to length to obtain a Cu/oxide single core rod;
step 3, pouring the molten Sn into an oxygen-free copper cylinder to obtain a Cu/Sn blank, and then performing multi-pass cold precision forging, drawing, forming and cutting to length to obtain a Cu/Sn single core rod;
step 4, assembling the Cu/Nb-X-Y single core rod and the Cu/oxide single core rod in an oxygen-free copper pipe in a hexagonal close packing manner, and obtaining an Nb module through drawing, forming and cutting to length;
and 5, assembling the Nb modules and the Cu/Sn single core rods in a Ta tube in a hexagonal close packing manner to ensure that six Cu/Sn single core rods are arranged around each Nb module, penetrating the assembled Ta tube through an oxygen-free copper tube to obtain a niobium three-tin superconducting strand blank, and performing multi-pass drawing to obtain the element-doped niobium three-tin superconducting strand with ultrahigh critical current density.
2. The method for preparing the element-doped niobium tri-tin superconducting strand with high critical current density as claimed in claim 1, wherein in the step 1, the copper ratio of the Cu/Nb-X-Y single core rod is between 0.15 and 0.2, and the size is between H3.5mm and H6.0mm.
3. The method for preparing the element-doped niobium tri-tin superconducting strand with high critical current density as claimed in claim 1, wherein in the step 2, the oxide powder is SnO 2 Powder or CuO powder; the copper ratio of the Cu/oxide single core rod is 0.1-0.2, and the size of the Cu/oxide single core rod is H3.5mm-H6.0 mm.
4. The method for preparing the element-doped niobium three-tin superconducting strand with high critical current density as claimed in claim 1, wherein in the step 3, the copper ratio of the Cu/Sn single core rod is between 0.2 and 0.5, and the size is between H3.5mm and H6.0mm.
5. The method for preparing the element-doped niobium three-tin superconducting strand with high critical current density as claimed in claim 1, wherein in the step 4, the number ratio of the Cu/Nb-X-Y single core rods to the Cu/oxide single core rods is controlled to be 8-18, and the Cu/oxide single core rods are ensured to be uniformly distributed in the Nb module.
6. The method for preparing the element-doped niobium tri-tin superconducting strand with high critical current density as claimed in claim 1, wherein the cross sections of the Cu/Nb-X-Y single core rod, the Cu/oxide single core rod, the Cu/Sn single core rod and the Nb module are all hexagonal.
7. The method for preparing the element-doped niobium three-tin superconducting strand with high critical current density as claimed in claim 1, wherein in the step 5, the copper ratio of the niobium three-tin superconducting strand blank is between 0.5 and 2.
CN202211219192.6A 2022-09-30 2022-09-30 Preparation method of element-doped high-critical-current-density niobium-tin superconducting strand Active CN115295243B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211219192.6A CN115295243B (en) 2022-09-30 2022-09-30 Preparation method of element-doped high-critical-current-density niobium-tin superconducting strand

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211219192.6A CN115295243B (en) 2022-09-30 2022-09-30 Preparation method of element-doped high-critical-current-density niobium-tin superconducting strand

Publications (2)

Publication Number Publication Date
CN115295243A CN115295243A (en) 2022-11-04
CN115295243B true CN115295243B (en) 2022-12-30

Family

ID=83834751

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211219192.6A Active CN115295243B (en) 2022-09-30 2022-09-30 Preparation method of element-doped high-critical-current-density niobium-tin superconducting strand

Country Status (1)

Country Link
CN (1) CN115295243B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117253670B (en) * 2023-11-20 2024-02-20 西安聚能超导线材科技有限公司 Oxygen permeation Nb 3 Sn superconducting wire and preparation method and application thereof
CN117292886B (en) * 2023-11-23 2024-03-19 西安聚能超导线材科技有限公司 Nb preparation by powder tubing method 3 Method of Sn superconducting wire

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101797684A (en) * 2010-04-02 2010-08-11 西部超导材料科技有限公司 Method for drilling deep hole on CuNb composite tube in internal-tin method Nb3Sn wire preparation process
CN102339664A (en) * 2011-08-25 2012-02-01 西部超导材料科技有限公司 Method for preparing high-field Nb3Sn superconducting strand with Nb47Ti bar to add Ti
EP2448029A2 (en) * 2010-10-28 2012-05-02 Hitachi Cable, Ltd. Precursor for Nb3Sn superconductor wire, superconductor wire using the same and method for manufacturing Nb3Sn superconductor wire
JP2013206532A (en) * 2012-03-27 2013-10-07 Japan Superconductor Technology Inc PRECURSOR FOR MANUFACTURING Nb3Sn SUPERCONDUCTING WIRE ROD BY INTERNAL Sn METHOD, Nb3Sn SUPERCONDUCTING WIRE ROD, AND MANUFACTURING METHODS THEREFOR
JP2013251180A (en) * 2012-06-01 2013-12-12 Sh Copper Products Corp Precursor wiring material of triniobium-tin superconducting multi-core wiring material, and triniobium-tin superconducting multi-core wiring material arranged using the same
CN106170464A (en) * 2014-02-18 2016-11-30 俄亥俄州立大学 Superconducting line and preparation method thereof
JP2019179674A (en) * 2018-03-30 2019-10-17 古河電気工業株式会社 PRECURSOR FOR Nb3Sn SUPERCONDUCTING WIRE ROD, Nb3Sn SUPERCONDUCTING WIRE ROD, AND MODULE
CN110391048A (en) * 2019-06-19 2019-10-29 西部超导材料科技股份有限公司 A kind of Nb3The preparation method of Sn presoma wire rod
CN110580985A (en) * 2018-06-11 2019-12-17 西部超导材料科技股份有限公司 Method for preparing high critical current niobium-tin superconducting strand in external blocking mode
CN110993185A (en) * 2019-12-23 2020-04-10 福建师范大学 Ti-doped internal tin method Nb3Preparation method of Sn precursor wire
CN113096881A (en) * 2021-04-16 2021-07-09 西部超导材料科技股份有限公司 Preparation method of high-strength high-critical-current niobium-tin superconducting strand
CN114864177A (en) * 2022-05-23 2022-08-05 合肥夸夫超导科技有限公司 Internal tin method Nb 3 Preparation method of Sn precursor wire

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110444337B (en) * 2019-06-19 2021-01-01 西部超导材料科技股份有限公司 Winding method Nb3Preparation method of Sn superconducting wire

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101797684A (en) * 2010-04-02 2010-08-11 西部超导材料科技有限公司 Method for drilling deep hole on CuNb composite tube in internal-tin method Nb3Sn wire preparation process
EP2448029A2 (en) * 2010-10-28 2012-05-02 Hitachi Cable, Ltd. Precursor for Nb3Sn superconductor wire, superconductor wire using the same and method for manufacturing Nb3Sn superconductor wire
CN102339664A (en) * 2011-08-25 2012-02-01 西部超导材料科技有限公司 Method for preparing high-field Nb3Sn superconducting strand with Nb47Ti bar to add Ti
JP2013206532A (en) * 2012-03-27 2013-10-07 Japan Superconductor Technology Inc PRECURSOR FOR MANUFACTURING Nb3Sn SUPERCONDUCTING WIRE ROD BY INTERNAL Sn METHOD, Nb3Sn SUPERCONDUCTING WIRE ROD, AND MANUFACTURING METHODS THEREFOR
JP2013251180A (en) * 2012-06-01 2013-12-12 Sh Copper Products Corp Precursor wiring material of triniobium-tin superconducting multi-core wiring material, and triniobium-tin superconducting multi-core wiring material arranged using the same
CN106170464A (en) * 2014-02-18 2016-11-30 俄亥俄州立大学 Superconducting line and preparation method thereof
JP2019179674A (en) * 2018-03-30 2019-10-17 古河電気工業株式会社 PRECURSOR FOR Nb3Sn SUPERCONDUCTING WIRE ROD, Nb3Sn SUPERCONDUCTING WIRE ROD, AND MODULE
CN110580985A (en) * 2018-06-11 2019-12-17 西部超导材料科技股份有限公司 Method for preparing high critical current niobium-tin superconducting strand in external blocking mode
CN110391048A (en) * 2019-06-19 2019-10-29 西部超导材料科技股份有限公司 A kind of Nb3The preparation method of Sn presoma wire rod
CN110993185A (en) * 2019-12-23 2020-04-10 福建师范大学 Ti-doped internal tin method Nb3Preparation method of Sn precursor wire
CN113096881A (en) * 2021-04-16 2021-07-09 西部超导材料科技股份有限公司 Preparation method of high-strength high-critical-current niobium-tin superconducting strand
CN114864177A (en) * 2022-05-23 2022-08-05 合肥夸夫超导科技有限公司 Internal tin method Nb 3 Preparation method of Sn precursor wire

Also Published As

Publication number Publication date
CN115295243A (en) 2022-11-04

Similar Documents

Publication Publication Date Title
CN115295243B (en) Preparation method of element-doped high-critical-current-density niobium-tin superconducting strand
CN101313373B (en) Nb-containing rod-shaped material for use in manufacture of superconducting wire and method for manufacture of Nb3Sn superconducting wire
EP3062359A1 (en) Precursor wire for a nb3sn superconducting wire and method for producing the precursor wire
CN115295242B (en) Preparation method of niobium tri-tin superconducting stranded wire with high critical current density
CN114694894B (en) Short-range diffusion type Nb 3 Preparation method of Sn superconducting wire
JP6270209B2 (en) Method for producing Nb3Sn superconducting wire
CN114649115B (en) Preparation method of double-Sn-source type Nb3Sn superconducting wire
CN115312258A (en) Improved preparation method of iron-based superconducting long wire
JP5065582B2 (en) Superconducting device and manufacturing method thereof
JPS60199522A (en) Manufacture of superconductive alloy wire
WO2021024529A1 (en) PRECURSOR FOR Nb3Sn SUPERCONDUCTIVE WIRE MATERIAL, PRODUCTION METHOD THEREFOR, AND PRODUCTION METHOD FOR Nb3Sn SUPERCONDUCTIVE WIRE MATERIAL USING SAME
EP0498413B1 (en) Method of manufacturing Nb3Sn superconducting wire
JPH0440806B2 (en)
DE2835974B2 (en) Method of manufacturing a composite multi-core superconductor
JP5557086B2 (en) Nb3Al superconducting wire
CN108735387A (en) A kind of preparation method of the superconductive cable super large-scale copper line of rabbet joint
JP4476800B2 (en) Method for producing Nb3Sn superconducting wire
JP4817094B2 (en) Manufacturing method of superconducting alloy multi-core wire
JPH0850827A (en) Manufacture of superconductor
CN117809903A (en) Preparation method of manually-pinned NbTi multi-core superconducting wire
CN1490825A (en) High temperature bismuth system superconductive bands and manufacture thereof
CN1259446C (en) Method for preparing artificial pinning NbTi superconductor
JPH0528860A (en) Manufacture of superconductive wire of nb3sn type
JPS61279662A (en) Production of nb3sn multi-cored superconductive wire
CN112489884A (en) Iron-based superconducting composite wire and preparation method thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant