Abstract
RE-Ba-Cu-O bulk superconductors fabricated by melt-process have the distinctive feature of a high critical current density of 77K in strong magnetic fields, and consequently are expected to be used for next-generation current leads. We have made proto-type of RE-Ba-Cu-O bulk current leads and investigated the transport properties, the heat leak, the thermal cycle toughness and the mechanical properties. This paper presents the structure of the bulk current leads and the test results obtained so far.
