YBCO/Ag bulk material by melt crystalization for cryomagneticapplications

摘要

Based on thermoanalytic investigations a melt crystallization process was developed with reduced process temperatures and process times to produce YBCO/Ag monoliths (d=26 mm) achieving the homogenous distribution of small sized Ag inclusions. The mechanical properties are improved, but the superconducting properties at 77 K, B0 (480 mT) and FN (40 N) are slightly reduced compared with YBCO monoliths without an addition of Ag (750 mT and 65 N). The maximum trapped flux was increased to the value B0 9.4 T at 26.5 K, instead of 8.4 T in the Ag-free bulk monolith