Current transport and microstructural evolution in BSCCO tapes fabricated by groove rolling.

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The powder-in-tube technique, consisting of wire drawing and rolling, has been widely used to fabricate superconducting tapes for possible electric power applications. In this study, instead of wire drawing, the starting billet was reduced in size by groove rolling. To optimize the deformation and thermomechanical treatment process, wires of varying dimensions were fabricated. The wires were flat-rolled to a final thickness of 250 mm. Short-length tapes were subjected to a series of thermal and deformation steps. Phase development and microstructural evolution during the process were monitored by XRD, SEM, and TEM. The BSCCO-2223 tapes, which were subjected to thermomechanical treatment, ... continued below

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15 p.

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Balachandran, U.; Iyer, A. N.; Mironova, M.; Salama, K.; Stolbov, S. & Vipulanandan, C. January 27, 1999.

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Description

The powder-in-tube technique, consisting of wire drawing and rolling, has been widely used to fabricate superconducting tapes for possible electric power applications. In this study, instead of wire drawing, the starting billet was reduced in size by groove rolling. To optimize the deformation and thermomechanical treatment process, wires of varying dimensions were fabricated. The wires were flat-rolled to a final thickness of 250 mm. Short-length tapes were subjected to a series of thermal and deformation steps. Phase development and microstructural evolution during the process were monitored by XRD, SEM, and TEM. The BSCCO-2223 tapes, which were subjected to thermomechanical treatment, had average critical current densities of 18,000 A cm{sup {minus}2}. Colony boundaries, examined by TEM, near the superconductor-silver interface were found to form in certain preferred orientations. Polytypoids of 2212 phase were also observed at the colony boundary. The effects of grain boundary on superconducting order parameter and critical current density have also been examined.

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15 p.

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OSTI as DE00012376

Medium: P; Size: 15 pages

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  • 1998 Applied Superconductivity Conference, Palm Desert, CA (US), 09/13/1998--09/18/1998

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  • Report No.: ANL/ET/CP-98288
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 12376
  • Archival Resource Key: ark:/67531/metadc622630

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  • January 27, 1999

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  • June 16, 2015, 7:43 a.m.

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  • April 7, 2017, 2:57 p.m.

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Balachandran, U.; Iyer, A. N.; Mironova, M.; Salama, K.; Stolbov, S. & Vipulanandan, C. Current transport and microstructural evolution in BSCCO tapes fabricated by groove rolling., article, January 27, 1999; Illinois. (digital.library.unt.edu/ark:/67531/metadc622630/: accessed September 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.