# Development of the Ultrafine MgB<sub>2</sub> Superconducting Wires and Flexible Cables

https://mdr.nims.go.jp/datasets/b1f98301-8672-4b5f-98b7-c04031b72b17

## Files

- [EUCAS2023_FINAL_VERSION.PDF.pdf](https://mdr.nims.go.jp/filesets/31443480-2af0-4ed1-8040-a176b198dbee/download) ([Detail](https://mdr.nims.go.jp/filesets/31443480-2af0-4ed1-8040-a176b198dbee.md))

## Id

b1f98301-8672-4b5f-98b7-c04031b72b17

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-08-19T12:34:24.239767Z

## Updated at

2025-11-21T23:30:16.771313Z

## Published at

2025-11-21T23:22:56.590205Z

## Doi

https://doi.org/10.48505/nims.4700

## First published url

https://doi.org/10.1109/tasc.2023.3335881

## Date published

2023-11-22

## Recorded date published



## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Development of the Ultrafine MgB<sub>2</sub> Superconducting Wires and Flexible
    Cables
  title_type: original
  lang: en

## Description

- description: We successfully fabricated the ultrafine MgB2 mono-core superconducting
    wires through the general in-situ powder-in-tube process by using a starting mixture
    of commercial Mg and B powders. The critical current (Ic) decreased monotonically
    with decreasing the wire diameter, meanwhile, the critical current density was
    almost the same value with decreasing the wire diameter down to 0.05 mm. In addition,
    we recognized the Monel outer sheath was very effective in improving the cold-die-drawability
    to forward the ultrafine diameter. It was fabricated 4 km of long piece length
    without the wire breakage for the Monel sheathed mono-core wire 0.05 mm in diameter.
    Furthermore, we challenged the limits of diameter reduction in the present drawing
    technique, and eventually, the Monel sheathed MgB2 mono-core superconducting wire
    with 0.015 mm in diameter and 135 m in length was obtained. This is currently
    the thinnest MgB2 superconducting wire in the world.
  description_type: abstract
  lang: und

## Creator

- name: Akihiro Kikuchi
  role: author
  orcid: https://orcid.org/0000-0002-5044-7156
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Yasuo Iijima
  role: author
  orcid: https://orcid.org/0000-0002-9008-9429
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Hiroaki Kumakura
  role: author
  orcid: https://orcid.org/0000-0001-9070-4068
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Masaru Yamamoto
  role: author
- name: Masatoshi Kawano
  role: author
- name: Masato Otsubo
  role: author

## Contact agent



## Publisher

organization: Institute of Electrical and Electronics Engineers (IEEE)

## Managing organization



## Keyword

- subject: MgB2, wire, in-situ process, powder in tube process, die-drawing, fine
    diameter, twisted cable, flexibility
  schema: not_defined

## Rights

- description: "© 2023 IEEE.  Personal use of this material is permitted.  Permission
    from IEEE must be obtained for all other uses, in any current or future media,
    including reprinting/republishing this material for advertising or promotional
    purposes, creating new collective works, for resale or redistribution to servers
    or lists, or reuse of any copyrighted component of this work in other works."
  identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo

start_date: 2023-11-22
end_date: 2025-11-22

## Journal

- title: IEEE Transactions on Applied Superconductivity
  issn: '10518223'
  volume: '34'
  issue: '3'
  start_page: 1
  end_page: 4
  article_number: '6200104'

## Conference



## Related item



## Funding

- identifier: JPNP14004
  funder_name: New Energy and Industrial Technology Development Organization

## Instrument



## Instrument operator



## Instrument managing organization



## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



## Structural feature for specimen



## Specific property for specimen



## Process for specimen treatment



## Computational method



## Energy level/transition state



## Software



## Custom property



## Fileset

- id: 31443480-2af0-4ed1-8040-a176b198dbee
  filename: EUCAS2023_FINAL_VERSION.PDF.pdf
  content_type: application/pdf
  size: 3529369
  md5: 0a0efd6e663766bfb6958c57c2831e29

## Thumbnail

fileset_id: 31443480-2af0-4ed1-8040-a176b198dbee
filename: EUCAS2023_FINAL_VERSION.PDF.pdf