127 超伝導インサート材を用いたY系超伝導バルク体の接合(OS 複合材料CMC及びMMC)

概要

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YBa_2Cu_3O_<7-x> bulk superconductors (YBCO) are joined with insertion of the YBa_2Cu_3O_<7-x> superconductor (YbBCO) added with Ag_2O as the interlayer, which has lower peritectic temperature than the YBCO. The amount of Ag_2O addition is varied from none to 44 mass%. At high temperature under loading, the good joint is obtained. The shear strength of joints increases with addition of Ag_2O. The higher joining temperature, the stronger joint is obtained. The critical current density through the joint is maximum at the rage of 10〜30 mass% of Ag_2O addition. On the other side, the bulk material of the mixture of YBCO and YbBCO has the intermediate value of the critical temperature between the value of YBCO and YbBCO. It might suggest that the addition of the YBCO to this interlayer have the better characteristics as the superconductor.
社団法人日本機械学会の論文
2001-11-02