Critical current density and dissipation in sintered YBCO filaments

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Critical current density and dissipation of four sintered YBCO filaments were measured using a continuous DC power supply. Each sample exhibited somewhat different characteristics from the others even though 3 of the 4 samples are 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 of the filament is in the normal state (local hot spots). This behavior may be advantageous for resistive fault current limiters because the intermediate state (partly flux-flow and partly normal) ... continued below

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18 p.

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Cha, Y.S.; Hull, J.R. & Seol, S.Y. September 1, 1997.

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Description

Critical current density and dissipation of four sintered YBCO filaments were measured using a continuous DC power supply. Each sample exhibited somewhat different characteristics from the others even though 3 of the 4 samples are 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 of the filament is in the normal state (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 much higher than that of the flux-flow state but it does not lead to thermal runaway (burnout) or excessive heating compared to a YBCO filament driven into normal state over its entire length. Two of the samples were broken as a result of local burnout.

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18 p.

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OSTI as DE97053957

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  • Joint cryogenic engineering conference and international cryogenic materials conference, Portland, OR (United States), 27 Jul - 1 Aug 1997

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  • Other: DE97053957
  • Report No.: ANL/ET/CP--94032
  • Report No.: CONF-970758--
  • Grant Number: W-31-109-ENG-38
  • Office of Scientific & Technical Information Report Number: 563819
  • Archival Resource Key: ark:/67531/metadc697108

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Office of Scientific & Technical Information Technical Reports

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  • September 1, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Dec. 15, 2015, 12:06 p.m.

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Cha, Y.S.; Hull, J.R. & Seol, S.Y. Critical current density and dissipation in sintered YBCO filaments, article, September 1, 1997; Illinois. (digital.library.unt.edu/ark:/67531/metadc697108/: accessed November 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.