Oriented Bulk Consolidation of Bi–Sr–Ca–Cu–O by Shock-Loading Method

Shock compaction experiments were carried out for Bi2Sr2CaCu2Oy particles sorted to 46–74 µ m and packing density of 50–82% at a shock pressure of 8 GPa. Bulk density reached 95% by shock compaction independent of the porosity. The most effective orientation was achieved by shock loading for the packing density of 67% and with post annealing at 870°C. The texture of the shocked plus postannealed specimen showed crystal growth not only within the c-plane but also along the c-axis. The Meissner volume fraction of the shock compacted specimen decreased with decreasing packing density but the onset temperature did not change. The magnetic torque of shock plus annealed specimen showed the alignment of particles.