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

doi:10.1088/0953-2048/25/5/054012

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

High Field Laboratory for Superconducting Materials

Research output: Contribution to journal › Article › peer-review

25 Citations (Scopus)

Abstract

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 language	English
Article number	054012
Journal	Superconductor Science and Technology
Volume	25
Issue number	5
DOIs	https://doi.org/10.1088/0953-2048/25/5/054012
Publication status	Published - 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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abstract = "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.",

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AU - Nishijima, G.

AU - Ye, S. J.

AU - Matsumoto, A.

AU - Togano, K.

AU - Kumakura, H.

AU - Kitaguchi, H.

AU - Oguro, H.

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N2 - 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.

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