Superconducting Properties of Reacted Mono- and Multifilament MgB2 Wires with Respect to Bending Diameters Using a Custom-Made Bending Test Probe

Byeongha Yoo, Jung Bin Song, Jong Cheol Kim, Young Gyun Kim, Jiman Kim, Kihong Sim, Iksang Shin, Duck Young Hwang, Haigun Lee

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


In this paper, the superconducting properties of reacted mono- and multifilament MgB2 wires were investigated with regards to the bending diameter via a three-point bending test using a lab-made bending test probe. The wires were manufactured by Kiswire Advanced Technology Co., Ltd. According to the results of the bending test, the tolerable bending diameters for mono- and multifilament MgB2 wires were 30 and 160 mm, respectively. In addition, the multifilament wire at a bending diameter of 150 mm showed the existence of a resistive zone caused by the 'disconnection' of the MgB2 filaments due to microcracks developed across the entire wire along the transverse direction of the filament. Monofilament wires have the potential to be utilized in most superconducting applications in terms of bending diameter, whereas the bending properties of multifilament wires require improvement to facilitate the design and fabrication of multifilament MgB2 magnets.

Original languageEnglish
Article number8400806
JournalIEEE Transactions on Applied Superconductivity
Issue number3
Publication statusPublished - 2018 Apr

Bibliographical note

Funding Information:
Manuscript received August 28, 2017; accepted January 23, 2018. Date of publication January 26, 2018; date of current version February 20, 2018. This work was supported by the Materials and Components Technology Development Program of KEIT (10053590, Development of MgB2 wire and coil with a high critical current and long length for superconducting medical electric power equipment). (Corresponding author: Haigun Lee.) B. Yoo, J. C. Kim, Y.-G. Kim, and H. Lee are with the Department of Material Science and Engineering, Korea University, Seoul 02841, South Korea (e-mail:

Publisher Copyright:
© 2002-2011 IEEE.


  • Bending diameter
  • MgB2
  • bending test
  • mono and multifilamentary superconductors

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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