Abstract: A multifilamentary superconducting composite article includes a plurality of oxide superconducting filaments in a ductile metal matrix arranged about a central core, and a region of high resistivity embedded within and adherent to the metal matrix and substantially surrounding each oxide superconducting filament. The high resistivity region is perforated and the perforation is occupied by a material having a bulk material resistivity greater than 0.4 &mgr;-cm. The article demonstrates a filament to filament resistance greater than 1×10−6 ohm-cm at T>Tc, where resistance is the four-point transport resistance between filaments multiplied by the measured sample length The ac power loss in a field perpendicular to the strand surface or in any other orientation is less than 2.5 mW/A-m at greater than 10 mT (RMS ac field, 30-300 Hz), as measured by magnetic methods without transport current. Methods of manufacture are provided.

Abstract: A multifilamentary superconductor composite having a high fill factor is formed from a plurality of stacked monofilament precursor elements, each of which includes a low density superconductor precursor monofilament. The precursor elements all have substantially the same dimensions and characteristics, and are stacked in a rectilinear configuration and consolidated to provide a multifilamentary precursor composite. The composite is thereafter thermomechanically processed to provide a superconductor composite in which each monofilament is less than about 50 microns thick.

Abstract: A multifilamentary superconductor composite having a high fill factor is formed from a plurality of stacked monofilament precursor elements, each of which includes a low density superconductor precursor monofilament. The precursor elements all have substantially the same dimensions and characteristics, and are stacked in a rectilinear configuration and consolidated to provide a multifilamentary precursor composite. The composite is thereafter thermomechanically processed to provide a superconductor composite in which each monofilament is less than about 50 microns thick.