# Examination of factors affecting strain tolerance of multifilament MgB<sub>2</sub> wires with Fe barrier

https://mdr.nims.go.jp/datasets/2173e5f5-f65f-445b-9215-7fffa5d19906

## File

- [SUST-106318_Final_20241119.pdf](https://mdr.nims.go.jp/filesets/3f2716ff-10f1-40b0-a429-7545f5fad5ed/download) ([Detail](https://mdr.nims.go.jp/filesets/3f2716ff-10f1-40b0-a429-7545f5fad5ed.md))

## Id

2173e5f5-f65f-445b-9215-7fffa5d19906

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-04-02T06:41:13.151600Z

## Updated at

2025-12-18T23:30:40.880920Z

## Published at

2025-12-18T10:08:23.388417Z

## Doi

https://doi.org/10.48505/nims.5401

## First published url

https://doi.org/10.1088/1361-6668/ad977b

## Date published

2025-01-01

## Recorded date published

2025-1-1

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Examination of factors affecting strain tolerance of multifilament MgB<sub>2</sub>
    wires with Fe barrier
  title_type: original
  lang: en

## Description

- description: There are two fabrication processes, the wind and react method and
    the react and wind method, to manufacture magnesium diboride (MgB2) magnets. The
    react and wind method is desirable to simplify the coil fabrication process, but
    the understanding of strain tolerance of the sintered MgB2 wire is insufficient.
    Hence, this study focused on determining the main factors that contribute to the
    strain tolerance of the MgB2 wire with Fe barrier. It is generally thought that
    irreversible strain of sintered MgB2 wire is mainly determined from the residual
    strain of MgB2 filament, which is caused by the difference in the coefficient
    of thermal expansion among MgB2 and metal sheaths. To estimate the residual strain
    of MgB2 wire, the effect of yielded material must be considered. We calculated
    the residual strain of each constituent material used in the ten filaments MgB2
    wire in which copper was yielded during the cooling process from sintering temperature
    to room temperature. The calculated residual strains of metal sheaths except copper
    were compared with yield strains, and whether they yield was confirmed. The estimated
    residual strain of the MgB2 filament was also compared with the experimentally
    obtained irreversible strain, and the difference in these strains suggests the
    strain tolerance of the MgB2 filament. By measuring irreversible strains of the
    MgB2 wires having different sintering times but the same residual strain, it was
    confirmed that the effect of the mechanical strength of the MgB2 filament on the
    strain tolerance of the MgB2 wire is slight but certain.
  description_type: abstract
  lang: und

## Creator

- name: Hideki Tanaka
  role: author
  orcid: https://orcid.org/0000-0001-6253-5316
- name: Motomune Kodama
  role: author
  orcid: https://orcid.org/0000-0002-3963-0259
- name: Takaaki Suzuki
  role: author
- name: Hiroshi Kotaki
  role: author
- name: Gen Nishijima
  role: author
  orcid: https://orcid.org/0000-0001-7493-0559
- name: Akiyoshi Matsumoto
  role: author
  orcid: https://orcid.org/0000-0002-6388-2130
- name: Michinaka Sugano
  role: author
  orcid: https://orcid.org/0000-0001-5168-3276

## Contact agent



## Publisher

organization: IOP Publishing

## Managing organization



## Keyword

- subject: MgB2 wire
  schema: not_defined
- subject: strain tolerance
  schema: not_defined
- subject: residual strain
  schema: not_defined
- subject: yield strain
  schema: not_defined

## Rights

- description: This is the Accepted Manuscript version of an article accepted for
    publication in Superconductor Science and Technology.  IOP Publishing Ltd is not
    responsible for any errors or omissions in this version of the manuscript or any
    version derived from it.  The Version of Record is available online at https://doi.org/10.1088/1361-6668/ad977b.
  identifier: https://creativecommons.org/licenses/by-nc-nd/4.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo

start_date: 2024-12-17
end_date: 2025-12-17

## Journal

- title: Superconductor Science and Technology
  issn: '09532048'
  volume: '38'
  issue: '1'
  article_number: '015019'

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## Fileset

- id: 3f2716ff-10f1-40b0-a429-7545f5fad5ed
  filename: SUST-106318_Final_20241119.pdf
  content_type: application/pdf
  size: 837904
  md5: 59166d2a4eca0234c979261e8e99d39a

## Thumbnail

fileset_id: 3f2716ff-10f1-40b0-a429-7545f5fad5ed
filename: SUST-106318_Final_20241119.pdf