1997•Superconductor Science and TechnologyOpen access

Enhanced critical current density in multilayered Ag/(Bi, Pb)-2223 tapes fabricated by the tape-in-tube method

Upendran Syamaprasad, R.P. Aloysius, A. P. Sobha, Perumal Guruswamy, K. G. K. Warrier

Abstract

Multilayered Ag/(Bi, Pb)-2223 tapes comprising 10 elements were fabricated by the conventional wire-in-tube (WIT) method as well as a tape-in-tube (TIT) technique under identical thermomechanical conditions. The critical current densities of the TIT tapes were found to be more than three times those of the WIT tapes. Microstructural examination of the tape sections showed that the TIT method yields very uniform layers of the superconductor (SC) and Ag with the SC - Ag interface area more than twice that of the WIT tapes for the same SC and Ag ratio. The larger SC - Ag interface area and the improved texturing of the TIT tapes due to the use of pretextured monolayered tapes were found to be the reasons for the enhancement.

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Key concepts: Materials science, Critical current, Tube (container), Composite material, Strontium oxide, Superconductivity, High-temperature superconductivity, Current (fluid)