Advances in Long-Length BSCCO HTS Multifilamentary Composite Wire Development
Advances in the development of long-length BSCCO HTS composite wire are reviewed. Powder-in-tube processing was used to produce 19- and 133-filament tapes up to 300 m long. Critical current densities of 12,500 A/cm2 and 10,500 A/cm2 (77 K and self-field, 10−11−Ω·cm criteria) were achieved for the 19-filament wires in 100- and 300-m lengths, respectively. Significantly, these results demonstrate that short-length processing results can be extended to long lengths with little or no loss of performance. Performance uniformity over 100-m lengths was good, giving n-values up to 22. Common microstructural defects are highlighted and the use of these wires in practical demonstration applications is also discussed.
KeywordsCritical Current Density Final Heat Treatment Multifilamentary Wire Wire Tape American Superconductor Corporation
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