Processing and superconducting properties of Ag-Ti-Cu alloy-sheathed BiSrCaCuO tapes

摘要

Monofilamentary BSCCO 2223 tapes have been produced by the powder in tube method using Ag 10 wt% (Cu-Ti) alloy sheaths. There is an increase of hardness which improve the uniformity of the tapes, but also produces microstructural changes by the diffusion of Ti and Cu. The influence of the alloy composition on the critical current density of the final tapes has been analysed. Critical temperatures higher than 108 K (onset) and J_c values up to 6.2 kA/cm~2 at 77 K in the self field have been obtained for 5 wt% Ti, 5 wt% Cu silver alloyed tapes.