Conveners
M3OrH - BSCCO Wires and Tapes II: Processing & Properties
- Hanping Miao (Bruker OST)
- Tengming Shen (LBNL)
Sumitomo Electric Industries, Ltd. (SEI) has been developing the silver-sheathed Bi2223 multi-filamentary wires, DI-BSCCO (Dynamically-Innovative BSCCO). The wires have been improved various properties in response to the growing demands from the application products and projects. For use in high field-magnet applications, strong hoop stress is usually applied to HTS wire. Therefore, the wire...
Due to steady progress in both performance and application engineering, Bi-2212 round wires are increasingly attractive materials for ultra-high field (>25 T) magnets. In recent work to further improve the critical current density and repeatability of long length performance, we have worked closely with several US powder suppliers and national laboratories on Bi-2212 powder development. ...
JC and JE in Bi-2212 round wire is high enough for high-field magnet applications and it is now available in km-long piece lengths. Recent studies of Bi-2212 conductor are geared towards advancing the understanding and technology needed for Bi-2212 to be successful in high-field magnet applications. These include studies directed at understanding Bi-2212 overpressure processing heat...
A Bi2212-based, high temperature superconductor has been developed in reinforced, rectangular wire forms, with up to 400 MPa stress tolerances and high current densities, making them suitable for use in transposed cables, coils and magnets that are problematic with wide HTS tapes, and that need to operate beyond the field and temperature limits of low temperature superconductors. Our program...
Bi-2212 round wire is currently being developed for high-field magnet applications. The large critical current densities of present state-of-the-art Bi-2212 strands, coupled with their relatively ductile Ag/Ag alloy matrix, leads to stress-limited performance in many high field solenoids. The critical current degrades as a function of stress due to the onset of progressive fracture of the...
Minimizing hysteresis losses and maximizing transport critical current density (J$_{ct}$) of superconducting wires is important for all magnet applications. In multi-filamentary Bi-2212 round wires, filaments can couple physically by grain-to-grain contacts (bridging) developed during heat treatment, providing either a strong, fully coupled or a weak SNS coupling. Bridging is especially...
