Explosive consolidation of (Bi,Pb)-Sr-Ca-Cu-O superconductor powders during powder-in-tube processing

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Superconducting (2212) Bi-Sr-Ca-Cu-O (BSCCO) and BSCCO-Ag composites were explosively consolidated in silver tubing and then drawn and rolled into tapes. The silver-sheathed tapes were then subjected to repeated cycles of pressing and heat treatment, which resulted in enhanced texturing and grain growth and a subsequent increase in critical current density (J{sub c}). The effect of silver flake additions to the superconducting powder further increased texturing and J{sub c}, with optimal properties occurring in powders with 10 vol.% silver flake. Density measurements on the superconductor tapes showed that near-theoretical densities had been achieved at the end of the thermomechanical treatment (TMT). ... continued below

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8 p.

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Thomas, H.; Inal, O.T. & Balachandran, U. August 1995.

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  • Thomas, H.
  • Inal, O.T. New Mexico Inst. of Mining and Technology, Socorro, NM (United States). Materials and Metallurgical Engineering Dept.
  • Balachandran, U. Argonne National Lab., IL (United States). Energy Technology Div.

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Description

Superconducting (2212) Bi-Sr-Ca-Cu-O (BSCCO) and BSCCO-Ag composites were explosively consolidated in silver tubing and then drawn and rolled into tapes. The silver-sheathed tapes were then subjected to repeated cycles of pressing and heat treatment, which resulted in enhanced texturing and grain growth and a subsequent increase in critical current density (J{sub c}). The effect of silver flake additions to the superconducting powder further increased texturing and J{sub c}, with optimal properties occurring in powders with 10 vol.% silver flake. Density measurements on the superconductor tapes showed that near-theoretical densities had been achieved at the end of the thermomechanical treatment (TMT). Scanning electron microscopy indicated that grain alignment increased after TMT, with an apparent reduction in grain size after the fourth treatment. X-ray diffraction studies showed that grain orientation and conversion of 2212 to Bi{sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub 10{minus}x} are improved when explosive consolidation is introduced before the drawing step in the powder-in-tube process.

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8 p.

Notes

OSTI as DE96005530

Source

  • Materials Week `95, Cleveland, OH (United States), 29 Oct - 2 Nov 1995

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  • Other: DE96005530
  • Report No.: ANL/ET/CP--86054
  • Report No.: CONF-951026--8
  • Grant Number: W-31109-ENG-38
  • DOI: 10.2172/195646 | External Link
  • Office of Scientific & Technical Information Report Number: 195646
  • Archival Resource Key: ark:/67531/metadc670740

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  • August 1995

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  • June 29, 2015, 9:42 p.m.

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  • Dec. 16, 2015, 5:29 p.m.

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Thomas, H.; Inal, O.T. & Balachandran, U. Explosive consolidation of (Bi,Pb)-Sr-Ca-Cu-O superconductor powders during powder-in-tube processing, report, August 1995; Illinois. (digital.library.unt.edu/ark:/67531/metadc670740/: accessed September 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.