Abstract
In coil manufacturing for magnets and other electrical device applications that require long lengths of tapes, the joining of coated conductor (CC) tapes is still necessary. The joint is a critical part that may affect the performance of a particular device during its operation. Thus, a practical joint method which has a strong adhesion and low contact resistance without critical current I c degradation should be developed to meet both purposes of electrical and mechanical connections. In this study, a new joint method using ultrasonic welding (UW) was introduced and the parametric tests were performed to produce a good quality of UW joint. The mechanical-controlled solder joint method was also adopted for comparison. The electrical properties such as I c and specific joint resistance R sj were measured at 77 K and the results were compared for each method.
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