Check patentability & draft patents in minutes with Patsnap Eureka AI!

A method for characterizing the ability of bi2212 high temperature superconducting wire to resist creep deformation

A bi2212, high-temperature superconducting technology, applied in the usage of superconducting elements, superconducting devices, superconducting/high-conducting conductors, etc., can solve the problems of wire porosity differences, etc., achieve low cost, high accuracy of results, and simple Effect of resistance to creep deformation

Active Publication Date: 2021-05-14
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even the porosity of the wire prepared by the same powder or processing parameters also has certain differences

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment includes the following steps:

[0029] Step 1. Take two Bi2212 high-temperature superconducting wires with the same powder, processing parameters, length and diameter but different batches, and mark them as wire A and wire B respectively, and then polish the cross-sections of wire A and wire B respectively , statistically analyze and calculate the cross-sectional area percentage of the core wire in the cross-section of wire A and wire B, correspondingly marked as A% and B%, wherein A%=22.94%, B%=25.36%;

[0030] Step 2. Put wire rod A and wire rod B in step 1 into a heat treatment furnace for high-pressure heat treatment with the same process parameters, and take it out after cooling to room temperature; the process of high-pressure heat treatment is: 2 In a mixed atmosphere, first raise the temperature from 25°C to 820°C at a rate of 160°C / h for 2 hours, then raise the temperature to 888°C at a rate of 50°C / h and hold for 12 minutes, then cool down to 8...

Embodiment 2

[0037] This embodiment includes the following steps:

[0038] Step 1. Take two Bi2212 high-temperature superconducting wires with different powder compositions but the same processing parameters, length and diameter, and mark them as wire A and wire B respectively, where the powder composition used in wire A is Bi 2.17 Sr 1.94 Ca 0.89 Cu 2.0 o x , the powder composition used in wire B is Bi 2.10 Sr 1.90 Ca 0.86 Cu 2.0 o x , then respectively polish the cross-sections of wire A and wire B, statistically analyze and calculate the cross-sectional area percentage of the core wire in the cross-sections of wire A and wire B, correspondingly marked as A% and B%, wherein A%=28.40%, B% = 27.22%;

[0039] Step 2. Put wire rod A and wire rod B in step 1 into a heat treatment furnace for high-pressure heat treatment with the same process parameters, and take it out after cooling to room temperature; the process of high-pressure heat treatment is: 2 In a mixed atmosphere, first r...

Embodiment 3

[0046] This embodiment includes the following steps:

[0047] Step 1. Take two Bi2212 high-temperature superconducting wires that use powder, have the same length and diameter but have different processing parameters, and mark them as wire A and wire B respectively. When the processing size of the silver tube in the three-time cluster assembly drawing is from 8mm In the process of reducing to 4mm, the processing rate of wire A is 20%, and the processing rate of wire B is 10%. The percentage of the cross-sectional area of ​​the core wire is marked as A% and B%, where A%=27.40%, B%=28.12%;

[0048] Step 2. Put wire rod A and wire rod B in step 1 into a heat treatment furnace for high-pressure heat treatment with the same process parameters, and take it out after cooling to room temperature; the process of high-pressure heat treatment is: 2 In a mixed atmosphere, first raise the temperature from 25°C to 820°C at a rate of 160°C / h for 2 hours, then raise the temperature to 888°C ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for characterizing the ability of Bi2212 high-temperature superconducting wires to resist creep deformation. The method adopts the method of high-pressure heat treatment and then normal-pressure heat treatment to detect the diameter increase rate of different Bi2212 high-temperature superconducting wires before and after normal-pressure heat treatment. , Through comparative analysis, the creep deformation resistance of different Bi2212 high temperature superconducting wires is obtained. In the present invention, the internal creep stress of the wire rod is doubled through a high-pressure process, and then heat treatment at normal pressure is performed to cause obvious creep of the Bi2212 high-temperature superconducting wire rod, which facilitates detection and obtains the diameters of different Bi2212 high-temperature superconducting wire rods before and after normal pressure heat treatment. The creep deformation resistance of different Bi2212 high temperature superconducting wires can be obtained by increasing the rate of increase. This method is convenient and fast, with high accuracy, low cost and strong practicability. It is an excellent method for evaluating the creep deformation resistance of Bi2212 high temperature superconducting wires. Provide strong data support.

Description

technical field [0001] The invention belongs to the field of performance testing and characterization of high-temperature superconducting wires, and in particular relates to a method for characterizing the ability of Bi2212 high-temperature superconducting wires to resist creep deformation. Background technique [0002] The good macroscopic current-carrying performance and mechanical properties of Bi2212 high temperature superconducting wire are the key to its engineering application. The macroscopic current-carrying performance of the wire is closely related to the porosity in the wire: the larger the pore size and the number of pores, the worse the current-carrying performance. In addition, the ability of wire rods to resist creep deformation is an important indicator for evaluating the mechanical properties of wire rods, and it has important reference significance for evaluating the ability of wire rods to resist fracture or even leakage caused by creep deformation. [0...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01B12/04
CPCH01B12/04Y02E40/60
Inventor 李珍宝徐晓燕金利华刘国庆郑会玲焦高峰郝清滨刘学谦李成山
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com