Superconducting Joint of Y-Ba-Cu-O Using Various Superconducting Solders

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  • Iida Kazumasa
    Superconductivity Research Laboratory, International Superconductivity Technology Center, Div.III
  • Yoshioka Junko
    Superconductivity Research Laboratory, International Superconductivity Technology Center, Div.III
  • Negichi Tomokazu
    Superconductivity Research Laboratory, International Superconductivity Technology Center, Div.III Department of Materials Science and Technology Faculty of Engineering, Iwate University
  • Sakai Naomichi
    Superconductivity Research Laboratory, International Superconductivity Technology Center, Div.III
  • Noto Koshichi
    Department of Materials Science and Technology Faculty of Engineering, Iwate University
  • Murakami Masato
    Superconductivity Research Laboratory, International Superconductivity Technology Center, Div.III

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Other Title
  • Y-Ba-Cu-O系バルク超電導体の超電導接合
  • Y Ba Cu Oケイ バルク チョウデンドウタイ ノ チョウデンドウセツゴウ

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Two blocks of single grain Y-Ba-Cu-O superconductors were welded with various solder materials that have lower decomposition temperature than that of Y-Ba-Cu-O superconductors. Microstructural analyses revealed that no segregation of the secondary phase and/or the residual liquid phase was observed at the joint when the (110) surfaces were directed parallel to the welded region. We also found that Y-Ba-Cu-O joined with a sintered Y-Ba-Cu-O/Ag bar exhibited the strongest coupling.

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