K) Phase Formation at the Ag/bi-st=-ca-cu-0 Interface in Ag-clad Bi2sr2cacu208+x(tc= 75-95 Superconducting Tapes
نویسندگان
چکیده
The Ag/Bi-Sr-Ca-Cu-0 (BSCCO) interface in Ag-clad Bi-2212 tapes was investigated by high-resolution transmission electron microscopy. The interface was found to be well bonded and free of nonsuperconducting second phases. However, a one-half-unit-cell-thick layer of the Bi-2201 phase was observed between the Bi-2212 phase and the Ag-cladding. A very strong texturing of the (00 1) planes of the BSCCO parallel to the Ag was seen. When the interface was nearly parallel to the Bi-22 12 (00 1) planes, it tended to facet onto (00 1) , leaving steps of height equal to one-half the Bi-2201 lattice spacing. Thus, strong (001) texturing extends to the atomic scale.
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