Mechanical properties of MgB 2 superconducting wires fabricated by internal Mg diffusion process

G. Nishijima, S. J. Ye, A. Matsumoto, K. Togano, H. Kumakura, H. Kitaguchi, H. Oguro

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25 Citations (Scopus)


Mechanical properties of MgB 2 monocore superconducting wires fabricated by an internal Mg diffusion (IMD) process and a powder-in-tube (PIT) process were investigated. The uniaxial tensile strain dependence of critical current (I c) and the transverse compressive stress dependence of I c were investigated at 4.2K, 10T. The IMD-processed MgB 2 wire showed a large irreversibility tensile strain limit ( irr=0.67%) and transverse compressive stress tolerance of 206MPa, whereas the PIT-processed wire had 0.51% and 160MPa. Furthermore, the tensile strain sensitivity of I c for the IMD-MgB 2 wire was smaller than that for the PIT-MgB 2 wire. Consequently, mechanical properties of IMD-processed MgB 2 superconducting wires are better than those of PIT-processed wires.

Original languageEnglish
Article number054012
JournalSuperconductor Science and Technology
Issue number5
Publication statusPublished - 2012 May 1

ASJC Scopus subject areas

  • Ceramics and Composites
  • Condensed Matter Physics
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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