Speaker
Description
In this study, different types of joints (lap joint and bridge joint) using commercially available second-generation (2G) high-temperature superconductor (HTS) tapes from two manufacturers were prepared, and their I-V characteristics were studied at 77 K, liquid nitrogen temperature. Both types of joints were prepared by taking each sample of HTS tapes with effective overlapping lengths ranging from 30 mm to 100 mm using two low melting point soldered materials such as Pb63Sn37 and In52Sn48 alloys. Also, the pressure applied to the solder joint during the soldering process varied from 1 to 5 MPa. The effect of the type of solder materials, overlapping length, and applied pressure on the joint resistance and the critical current of the joint normalized to the critical current of initial HTS tape under a self-magnetic field were investigated at 77 K.
