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Critical Current Density and Dissipation in Sintered YBCO Filaments

  • Y. S. Cha
  • S. Y. Seol
  • J. R. Hull
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 43)

Abstract

Critical current density and dissipation of four sintered YBCO filaments were measured with a continuous DC power supply. Each sample exhibited somewhat different characteristics from the others even though three of the four samples were from the same batch. The data suggest that it is possible for the YBCO filament to be in a state of stable equilibrium when part of the filament is in the flux-flow state and part is in the normal state due to local hot spots. This behavior may be advantageous for resistive fault current limiters because the intermediate state (partly flux-flow and partly normal) has an overall resistance that is much higher than that of the flux-flow state but does not lead to thermal runaway (burnout) or excessive heating, unlike a YBCO filament driven into the normal state over its entire length. Two of the samples were broken as a result of local burnout.

Keywords

Solder Joint Critical Current Density Current Lead Heat Generation Rate Excessive Heating 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    S.Y. Seol, Y.S. Cha, R.C. Niemann, and J.R. Hull, Prediction of burnout of a conduction-cooled BSCCO current lead, IEEE Trans. Appl. Supercond. 7(2):696–699 (1997).CrossRefGoogle Scholar
  2. 2.
    J. D. Hodge, H. Muller, D.S. Applegate, and Q. Huang, A resistive fault current limiter based on high temperature superconductors, Appl. Supercond. 3(7–10):469–482 (1995).CrossRefGoogle Scholar
  3. 3.
    A. Abeln, E. Klemt, and H. Reiss, Stability considerations for design of a high temperature superconductor, Cryogenics 32:269–278 (1992).CrossRefGoogle Scholar
  4. 4.
    Y.S. Cha, S.Y. Seol, D.J. Evans, and J.R. Hull, Flux-flow resistivity of three high-temperature superconductors, IEEE Trans. Appl. Supercond. 7(2):2122–2125 (1997).CrossRefGoogle Scholar
  5. 5.
    Y.S. Hascieck and L.R. Testardi, Constant E-J relation in the current induced resistive state of YBa2Cu3O7-x, IEEE Trans. Magn. 27:1186–1189 (1991).CrossRefGoogle Scholar
  6. 6.
    T.R. Askew, J.G. Nesteil, R.B. Flippen, D.M. Groski, and N.McN. Alford, Dynamic measurement of flux flow resistivity in YBa2Cu3O7 wires, IEEE Trans. Appl. Supercond. 3:1398–1401 (1993).CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1998

Authors and Affiliations

  • Y. S. Cha
    • 1
  • S. Y. Seol
    • 2
  • J. R. Hull
    • 1
  1. 1.Energy Technology DivisionArgonne National LaboratoryArgonneUSA
  2. 2.Chonnam National UniversityKwangjuKorea

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