Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
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Measurement reliability of irreversible stress/strain limits in Sn-Cu double layer stabilized IBAD/RCE-DR processed GdBCO coated conductor tapes under uniaxial tension at 77 K

  • Received : 2018.12.18
  • Accepted : 2018.12.31
  • Published : 2018.12.31
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Abstract

In this study, the electromechanical properties in Sn-Cu double layer stabilized GdBCO coated conductor (CC) tapes with and without external lamination under uniaxial tension were examined at 77 K and self-field. Their irreversible stress and strain limits were determined using a loading-unloading scheme based on different critical current ($I_c$) recovery criteria. The repeated tests were performed and statistical estimation was done to check the reproducibility depending on the criterion adopted in evaluating the electromechanical properties. From the results, it showed that the Sn-Cu double-layer stabilized CC tapes have the higher irreversible stress limit, but lower irreversible strain limit as compared to brass laminated ones. Through the repeated tests, it can be found that a small scattering of irreversible limits existed in both CC tape samples. Finally, similar strain sensitivity of $I_c$ in both CC tapes was obtained.

Keywords

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Fig. 1. Sample structures of Sn-Cu double-layer stabilized CC tape (a) without and (b) with external brass laminates.

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Fig. 2. Appearance of CC tape sample installed with double extensometers and voltage taps for electromechanical property test by uniaxial tensile test at 77 K.

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Fig. 3. Normalized critical current, Ic/Ic0 as a function of (a) uniaxial tensile strain and (b) uniaxial tensile stress for Sn-Cu double-layer stabilized CC tapes (Sample 1) using the 99% Ic(ε) recovery criterion.

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Fig. 4. Normalized critical current, Ic/Ic0 as a function of (a) uniaxial tensile strain and (b) uniaxial tensile stress for brass laminated Sn-Cu double-layer stabilized CC tapes (Sample 2) using the 99% Ic(ε) recovery criterion.

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Fig. 6. Normalized critical current, Ic/Ic0 as a function of (a) uniaxial tensile strain and (b) uniaxial tensile stress for brass laminated Sn-Cu double-layer stabilized CC tapes (Sample 2) using 99%Ic0 recovery criterion. The closed symbols indicate the loading and open symbols indicate the unloading.

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Fig. 5. Normalized critical current, Ic/Ic0 as a function of (a) uniaxial tensile strain and (b) uniaxial tensile stress for Sn-Cu double-layer stabilized CC tapes (Sample 1) using 99%Ic0 recovery criterion. The closed symbols indicate the loading and open symbols indicate the unloading.

TABLE I SAMPLE SPECIFICATIONS.

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TABLE II ELECTROMECHANICAL PROPERTIES OF DOUBLE LAYER Sn-Cu STABILIZED CC TAPES UNDER UNIAXIAL TENSION.

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References

  1. C. Barth, G. Mondonico and C. Senatore, "Electro-mechanical properties of REBCO coated conductors from various industrial manufacturers at 77K, self-field and 4.2K, 19T", Supercond. Sci. Technol. vol. 28, p. 045011, 2015, https://doi.org/10.1088/0953-2048/28/4/045011
  2. M. Sugano, S. Machiya, H. Oguro, M. Sato, T. Koganezawa, T. Watanabe, K. Shikimachi, N. Hirano, S. Nagaya, T. Izumi, and T. Saitoh, "The effect of the 2D internal strain state on the critical current in GdBCO coated conductors," Supercond. Sci. Technol., vol. 25, p. 054014, 2012. https://doi.org/10.1088/0953-2048/25/5/054014
  3. W. Goldacker, F. Grilli, E. Pardo, A. Kario, S. Schlachter, and M. Vojenciak, "Roebel cables from REBCO coated conductors: a one-century-old concept for the superconductivity of the future", Supercond. Sci Technol. vol. 27, p. 093001, 2014 https://doi.org/10.1088/0953-2048/27/9/093001
  4. M. Sugano, K. Shikimachi, N. Hirano, and S. Nagaya, "The reversible strain effect on critical current over a wide range of temperatures and magnetic fields for YBCO coated conductors," Supercond. Sci. Technol., vol. 23, p. 085013, 2010. https://doi.org/10.1088/0953-2048/23/8/085013
  5. N. Cheggour, J. W. Ekin, C. C. Clickner, D. T. Verebelyi, C. L. H. Thieme, R. Feenstra, and A. Goyal, "Reversible axial-strain effect and extended strain limits in Y-Ba-Cu-O coatings on deformation-textured substrates," Appl. Phys. Lett., vol. 83, pp. 4223-5, 2003. https://doi.org/10.1063/1.1628818
  6. M. Sugano, K. Osamura, W. Prusseit, R. Semerad, T. Kuroda, K. Itoh, and T. Kiyoshi, "Irreversible strain dependence of critical current in 100 A class coated conductors," IEEE Trans. Appl. Supercond., vol. 15, no. 2, pp. 3581-84, 2005. https://doi.org/10.1109/TASC.2005.849365
  7. N. Cheggour, J. W. Ekin, Y. Y. Xie, V. Selvamanickam, C. L. Thieme, and D. T. Verebelyi, "Enhancement of the irreversible axial-strain limit of Y-Ba-Cu-O coated conductors with the addition of a Cu layer," Appl. Phys. Lett., vol. 87, p. 212505, 2005. https://doi.org/10.1063/1.2136231
  8. N. Cheggour, J. W. Ekin, C. L. H. Thieme, Y. Y. Xie, V. Selvamanickam, and R. Feenstra, "Reversible axial-strain effect in Y-Ba-Cu-O coated conductors," Supercond. Sci. Technol., vol. 18, pp. S319-S324, 2005. https://doi.org/10.1088/0953-2048/18/12/016
  9. S. Ochiai, H. Okuda, T Arai, M. Sugano, K, Osamura, and W. Prusseit, "Influence of Copper volume fraction in tensile strain/stress tolerances of critical current in Copper-plated DyBCO-coated conductor", The Japan Institute of Metals, vol. 54, no. 3,pp. 269-275, 2013
  10. H. S. Shin, K. H. Kim, J. R. C. Dizon, T. Y. Kim, R. K. Ko, and S. S. Oh, "The strain effect on critical current in YBCO coated conductors with different stabilizing layers," Supercond. Sci. Technol., vol. 18, pp. S364-S368, 2005. https://doi.org/10.1088/0953-2048/18/12/023
  11. M. J. Dedicatoria, and H. S. Shin, "Analysis on stress/strain tolerances of Ic in externally laminated GdBCO CC tapes," IEEE Trans. Appl. Supercond., vol. 23, no. 3, p. 8400504, 2013. https://doi.org/10.1109/TASC.2012.2234196
  12. H. S. Shin and M. J. Dedicatoria, "Intrinsic strain effect on critical current in Cu-stabilized GdBCO coated conductor tapes with different substrates," Supercond. Sci. Technol., vol. 26, p. 055005, 2013. https://doi.org/10.1088/0953-2048/26/5/055005
  13. Z. Bautista, and H S Shin, "Effect of differently hardened brass foil on the electromechanical property of externally laminated 2G CC tapes", Prog. Supercond. Cryog., vol 18(4), pp. 21-24, 2016. https://doi.org/10.9714/psac.2016.18.4.021
  14. H S Shin, M A Diaz, and Jae-Hun Lee, "Characterization of electromechanical properties of Sn-Cu double layer stabilized GdBCO coated conductor tapes at 77 K", Prog. Supercond. Cryog. vol. 19 No. 4, pp 26-30, 2017 https://doi.org/10.9714/psac.2017.19.1.026
  15. K. Osamura, S Machiya, and G. Nishijima, Reversinle stress and strain limits of the critical current of practical REBCO and BSCCO wires, Supercond. Sci. Technol., vol. 29, p. 094003, 2016 https://doi.org/10.1088/0953-2048/29/9/094003

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