Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
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Effects of differently hardened brass foil laminate on the electromechanical property of externally laminated CC tapes

  • Received : 2016.11.21
  • Accepted : 2016.12.22
  • Published : 2016.12.31
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Abstract

The mechanical properties of REBCO coated conductor (CC) wires under uniaxial tension are largely determined by the thick component layers in the architecture, namely, the substrate and the stabilizer or even the reinforcement layer. Depending on device applications of the CC tapes, it is necessary to reinforce thin metallic foils externally to one-side or both sides of the CC tapes. Due to the external reinforcement of brass foils, it was found that this could increase the reversible strain limit from the Cu-stabilized CC tapes. In this study, the effects of differently hardened brass foil laminate on the electromechanical property of CC tapes were investigated under uniaxial tension loading. The tensile strain dependence of the critical current ($I_c$) was measured at 77 K and self-field. Depending on whether the $I_c$ of CC tapes were measured during loading or after unloading, a reversible strain (or stress) limit could be determined, respectively. The both-sides of the Cu-stabilized CC tapes were laminated with brass foils with different hardness, namely 1/4H, 1H and EH. From the obtained results, it showed that the yield strength of the brass laminated CC tapes with EH brass foil laminate was comparable to the one of the Cu-stabilized CC tape due to its large yield strength even though its large volume fraction. It was found that the brass foil with different hardness was mainly sensitive on the stress dependence of $I_c$, but not on the strain sensitivity due to the residual strain induced in the laminated CC tapes during unloading.

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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. H. S. Shin and M. J Dedicatoria, "Variation of the strain effect on the critical current due to external lamination in REBCO coated conductors," Supercond. Sci. Technol., vol. 25, p. 054013, 2012. https://doi.org/10.1088/0953-2048/25/5/054013
  4. H. S. Shin and M. J Dedicatoria, "Review of progress in electromechanical properties of REBCO coated conductors for electric applications," Prog. Supercond. Cryo. vol. 16, no. 4, pp. 7-16, 2014. https://doi.org/10.9714/psac.2014.16.4.007
  5. 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
  6. H. S. Shin, A. Gorospe, A. R. Nisay, M. J. Dedicatoria, K. D. Sim, S. Awaji, and H. Oguro, "Macroscopic strain response of Ic under magnetic fields in differently stabilized REBCO CC tapes," IEEE Trans. on Appl. Supercond., vol. 25, no. 3, p. 6602104, 2015.
  7. J. Bascunan, S. Hahn, Y. Kim, J. Song, and Y. Iwasa, "Design and double-pancake coil fabrication," IEEE Trans. on Appl. Supercond., vol. 24, no. 3, p. 4300904, 2014.
  8. C. Senatore, M. Alessandrini, A. Lucarelli, R. Tediosi, D. Uglietti, and Y. Iwasa, "Progresses and challenges in the development of high-field solenoidal magnets based on RE123 coated conductors," Supercond. Sci. Technol., vol. 27, no. 10, p. 103001, 2014. https://doi.org/10.1088/0953-2048/27/10/103001
  9. T. Kiyoshi, S. Choi, S. Matsumoto, K. Zaitsu, T. Hase, T. Miyazaki, M. Hamada, M. Hosono, and H. Maeda, "Bi-2223 innermost coil for 1.03 GHz NMR magnet," IEEE Trans. on Appl. Supercond., vol. 21, no. 3, pp. 2110-2113, 2011. https://doi.org/10.1109/TASC.2010.2082475
  10. G. Bansal, N. Yanagi, T. Hemmi, K. Takahata, T. Mito, and A. Sagara, "High-temperature superconducting coil option for the LHD-type fusion energy reactor FFHR," Plasma and Fusion Research, vol. 3, p. 1049, 2008. https://doi.org/10.1585/pfr.3.S1049
  11. A. Otsuka, T. Kiyoshi, and M. Takeda, "A. 1.3 GHz NMR magnet design under high hoop stress condition," IEEE Trans. on Appl. Supercond., vol. 20, pp. 596-599, 2010. https://doi.org/10.1109/TASC.2009.2039555
  12. H. S. Shin, Z. Bautista, A. Gorospe, J. H. Lee, H. Lee and S. H. Moon, "Electro-mechanical properties of single-side brass foil laminated coated conductor tapes at 77 K under self-field," IEEE Trans. on Appl. Supercond., vol. 26, no. 4, p. 8401805, 2016.
  13. Z. Bautista, H. S. Shin, A. Gorospe, J. H. Lee, H. Lee and S. H. Moon, "Influence of brass laminate volume fraction on electromechanical properties of externally laminated coated conductor tapes," Prog. Supercond. Cryog., vol. 18, no. 3, pp. 6-9, 2016. https://doi.org/10.9714/psac.2016.18.3.006
  14. H. S. Shin, M. J. Dedicatoria, A. Gorospe, and S. H. Lee, "Experimental measurement of characteristic $I_c({\varepsilon},\;{\theta},\;B)$ response in $GdBa_2Cu_3O_{\delta}$ coated conductor tapes under low magnetic field at 77K," AIP, Rev. Sci. Instrum., vol. 86, p. 033907, 2015. https://doi.org/10.1063/1.4915320