Characterization of electromechanical properties in differently sheathed MgB 2 wires under uniaxial tension

Hyung Seop Shin, Mark A. Diaz, Zhierwinjay Bautista, Hidetoshi Oguro, Satoshi Awaji

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

In this study, the electromechanical properties of the differently sheathed 18 module MgB 2 wires were evaluated under uniaxial tensile loading at 20 K and 2 T. Four kinds of 18 module MgB 2 wire samples with different configurations were used. They have Cu sheath/Nb barrier/MgB 2 filament structure with different ratio of non-SC/SC or different sheath materials. The mechanical and electromechanical properties of the MgB 2 wires at 20 K and 2 T were examined using the Katagiri-type test probe. At 20 K, as the applied magnetic field increased, all MgB 2 samples showed a significant I c degradation but the same I c (B) dependence was observed regardless of the sheath configuration. Monel sheathed sample 4 exhibited the highest yield strength and elastic modulus, σ y = 634 MPa and E = 178 GPa at 20 K, respectively. Both samples 2 and 3 which had a lower non-SC/SC ratio by additional etching process exhibited a higher irreversible strain limit ϵ irr = 0.30%.

Original languageEnglish
Article number8630055
JournalIEEE Transactions on Applied Superconductivity
Volume29
Issue number5
DOIs
Publication statusPublished - 2019 Aug

Keywords

  • Electromechanical property
  • MgB2 wires
  • sheath configuration
  • sheath material

ASJC Scopus subject areas

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

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