J Mater Sci Technol ›› 1998, Vol. 14 ›› Issue (4): 374-376.

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Fabrication of Bi(2223)/Ag Superconducting Tapes withRectangular Cross Section by Hydrostatic Extrusion

Yanwei MA and Xanjin WANG (Dept. of Metal Forming, University of Science and Technology Beijing, Beijing 100083, China)Zutang WANG (Tsinghua University, Beijing 100084, China)   

  • Received:1998-07-28 Revised:1998-07-28 Online:1998-07-28 Published:2009-10-10

Abstract: Ag-sheathed Bi-2223 superconducting tapes with rectangular cross section were fabricated by hydrostatic extrusion. Microstructural analysis, microhardness measurement and X-ray diffraction have been carried out. The field dependence of the critical current density was investigated at 77 K. The rectangular shaped specimens show a higher density of oxide core. better grain alignment and less weak-linked microstructure compared to the traditional specimens.