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Tailored joint fabrication process derived ultra-low resistance MgB2 superconducting joint

Journal Article


Abstract


  • We report an ultra-low resistance superconducting joint using unreacted multifilament MgB2 wires produced by tailoring the powder compaction pressure within the joint with heat treatment conditions. The joint demonstrated an ultra-low resistance of 5.48 × 10−15 Ω and critical current (Ic) of 91.3 A at 20 K in self-field. The microstructural and composition studies of the joint revealed cracks and a high amount of MgO, respectively. These two features reduced the Ic of the joint to some extent; nevertheless, the joint resistance was not affected by it. Our tailored joining process will play a pivotal role in the superconducting joints development.

Authors


  •   Patel, Dipak (external author)
  •   Matsumoto, Akiyoshi (external author)
  •   Kumakura, Hiroaki (external author)
  •   Nishijima, Gen (external author)
  •   Maeda, Minoru (external author)
  •   Kim, Su-Hun (external author)
  •   Choi, Seyong (external author)
  •   Kim, Jung Ho

Publication Date


  • 2020

Citation


  • Patel, D., Matsumoto, A., Kumakura, H., Nishijima, G., Maeda, M., Kim, S., Choi, S. & Kim, J. (2020). Tailored joint fabrication process derived ultra-low resistance MgB2 superconducting joint. Scripta Materialia, 178 198-202.

Scopus Eid


  • 2-s2.0-85075247290

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3909

Number Of Pages


  • 4

Start Page


  • 198

End Page


  • 202

Volume


  • 178

Place Of Publication


  • United Kingdom

Abstract


  • We report an ultra-low resistance superconducting joint using unreacted multifilament MgB2 wires produced by tailoring the powder compaction pressure within the joint with heat treatment conditions. The joint demonstrated an ultra-low resistance of 5.48 × 10−15 Ω and critical current (Ic) of 91.3 A at 20 K in self-field. The microstructural and composition studies of the joint revealed cracks and a high amount of MgO, respectively. These two features reduced the Ic of the joint to some extent; nevertheless, the joint resistance was not affected by it. Our tailored joining process will play a pivotal role in the superconducting joints development.

Authors


  •   Patel, Dipak (external author)
  •   Matsumoto, Akiyoshi (external author)
  •   Kumakura, Hiroaki (external author)
  •   Nishijima, Gen (external author)
  •   Maeda, Minoru (external author)
  •   Kim, Su-Hun (external author)
  •   Choi, Seyong (external author)
  •   Kim, Jung Ho

Publication Date


  • 2020

Citation


  • Patel, D., Matsumoto, A., Kumakura, H., Nishijima, G., Maeda, M., Kim, S., Choi, S. & Kim, J. (2020). Tailored joint fabrication process derived ultra-low resistance MgB2 superconducting joint. Scripta Materialia, 178 198-202.

Scopus Eid


  • 2-s2.0-85075247290

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3909

Number Of Pages


  • 4

Start Page


  • 198

End Page


  • 202

Volume


  • 178

Place Of Publication


  • United Kingdom