| 摘要 |
PROBLEM TO BE SOLVED: To provide current-currying leads of an oxide superconductive coil, which are superior in strength and electric conductivity by constituting additive which an oxide generated by internal oxidation dispersively strengthens with gold alloy added to silver. SOLUTION: The oxide superconductive coil 101 is generated by winding a band-shaped superconductive wire 102 in a spiral form, and battledore-like current-carrying leads 103a and 103b are connected to both ends so that they are erected. Gold alloy is used for the conductive leads 103a and 103b. The composition is Ag-0.026at% Mg-0.01at% Ni, for example and it is connected and fixed to the oxide superconductive coil 101 by using silver solder. The oxide superconductive coil 101 to which the current carrying leads 103a and 103b are connected executes a partial melting/slow cooling/heating processing at the maximum temperature of 885 deg.C. In the process, the current-carrying leads 103a and 103b are distributively strengthened by means of the internal oxidation of additive with the heat processing, and strength improves. Thus, the current-carrying leads superior in strength and electric conductivity can be provided. |
