Abstract
Densification of Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub x/ (BSCCO-2212) powder cores in Ag-clad wires and tapes has been studied as a function of strain and initial packing density. Density was measured directly by etching away the silver and weighing the remaining core. A universal feature in both wires and tapes was the attainment of maximum densities (/spl sim/80%) at intermediate strains of /spl sim/4. The linear correlation between microhardness and density found for round wires breaks down for rolled tapes, apparently because the core separates into dense locks separated by cracks. >
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