Atmosphere control during preparation of YBa sub 2 Cu sub 3 O sub 7- x magnet windings

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Large coils of YBa{sub 2}Cu{sub 3}O{sub 7-x} can be fired successfully if the furnace atmosphere is carefully controlled. Organics added during processing produce CO{sub 2} during the initial portions of the firing schedule. Transmission electron microscopy of material fired in atmospheres containing various levels of CO{sub 2} clearly shows the extent of grain boundary degradation caused by CO{sub 2}. Coils with acceptable critical current density can be produced if the rate of CO{sub 2} removal is adequate. 9 refs., 4 figs., 1 tab.

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5 p.

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Poeppel, R. B.; Dorris, S. E.; Picciolo, J. J.; Balachandran, U.; Lanagan, M. T.; Zhang, C. Z. et al. October 1, 1990.

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Description

Large coils of YBa{sub 2}Cu{sub 3}O{sub 7-x} can be fired successfully if the furnace atmosphere is carefully controlled. Organics added during processing produce CO{sub 2} during the initial portions of the firing schedule. Transmission electron microscopy of material fired in atmospheres containing various levels of CO{sub 2} clearly shows the extent of grain boundary degradation caused by CO{sub 2}. Coils with acceptable critical current density can be produced if the rate of CO{sub 2} removal is adequate. 9 refs., 4 figs., 1 tab.

Physical Description

5 p.

Notes

OSTI; NTIS; GPO Dep.

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  • 3. international symposium on superconductivity, Sendai (Japan), 6-9 Nov 1990

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  • Other: DE91006570
  • Report No.: CONF-901169-6
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 6152210
  • Archival Resource Key: ark:/67531/metadc1110946

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  • October 1, 1990

Added to The UNT Digital Library

  • Feb. 22, 2018, 7:45 p.m.

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  • June 16, 2020, 11:24 a.m.

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Poeppel, R. B.; Dorris, S. E.; Picciolo, J. J.; Balachandran, U.; Lanagan, M. T.; Zhang, C. Z. et al. Atmosphere control during preparation of YBa sub 2 Cu sub 3 O sub 7- x magnet windings, article, October 1, 1990; Illinois. (https://digital.library.unt.edu/ark:/67531/metadc1110946/: accessed July 16, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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