Fabrication of BSCCO-2212 Composite Conductors by Dip Coating and Powder-in-Tube Techniques
Progress has been made in the development of long BSCCO-2212 phase conductors fabricated in the form of dip-coated tapes and as both monofilamentary and multifilamentary powder-in-tube wires and tapes. Single and multiple dip coatings have been made on silver tape in lengths up to 30 meters. Heat treatment studies in progress have been aimed at improving critical current density (Jc) at 4.2 K. Short sample values attained to date exceed 9×105 A/cm2 at 0 T and 1×105 A/cm2 at 10 T. Powder-in-tube conductors have been fabricated in lengths up to 15 m at 1 mm final diameter, both as monofilament and 55 filament conductors. Efforts to improve Jc have addressed heat treatment variables such as maximum temperature and cooling rate, as well as process methods that affect filament uniformity. In rolled monofilament tapes short sample Jc has reached 2×105 A/cm2 at 0 T. The 55 filament composite has reached 6×104 A/cm2 at 0 T over a 1 meter length.
KeywordsCritical Current Density Short Sample Ceramic Layer Final Diameter Heat Treatment Study
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