Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
권호 표지
DOI QR코드

DOI QR Code

Enhancement of a mechanical property of metal sheaths (Cu and Nb) of MgB2 superconducting wires by E-beam irradiation

  • Kim, C.J. (Korea Atomic Energy Research Institute) ;
  • Lee, T.R. (Korea University of Technology and Education) ;
  • Jun, B.H. (Korea Atomic Energy Research Institute)
  • Received : 2022.04.07
  • Accepted : 2022.05.17
  • Published : 2022.09.30
Download PDF
⟨ Previous Next ⟩

Abstract

Effects of electron beam (EB) irradiation on the mechanical strength of Cu (conducting sheath) and Nb (diffusion barrier) of Cu/Nb/MgB2 superconducting was investigated. Wire- and tape-type Cu/Nb/MgB2 samples were irradiated at E-beam energy of 2.5 MeV and 5 mA and a maximum E-beam dose was 5×1017 e/m2. The hardness value of Cu and Nb region was measured by the Vickers micro-hardness method. In the case of the wire sample, the hardness of Cu and Nb increased proportionally as the dose was increased up to 5×1017 e/m2, whereas in the case of the tape sample, the hardness increased up to a dose of 0.5×1017 e/m2, and decreased slightly 5×1017 e/m2. The hardness increase of Cu and Nb is believed to be due to the decrease of the deformability of Cu and Nb due to the defects formed inside the materials by E-beam irradiation.

Keywords

Acknowledgement

This work was supported by the National Research Foundation Grant (NRF-2020M2D8A2047959) funded from Ministry of Science and ICT(MSIT) of Republic of Korea.

References

  1. J. Nagamatsu, N. Nakagawa, T. Muranaka, Y. Zenitani, and J. Akimitsu, "Superconductivity at 39 K in magnesium diboride," Nature, vol. 410, pp. 63-64, 2001. https://doi.org/10.1038/35065039
  2. R. Musenich, P. Fabbricatore, S. Farinon, M.Greco, M. Modica, R. Marabotto, R. Penco, M. Razeti, and D. Nardelli, "The behaviour of cryogen-free MgB2 react and wind coils," Supercond. Sci. Technol., vol. 19, pp. S126-S131, 2006. https://doi.org/10.1088/0953-2048/19/3/018
  3. K. Vinod, R. G. Abhilash Kumar and U. Syamaprasad, "Prospects for MgB2 superconductors for magnet application," Supercond. Sci. Technol., vol. 20, pp. R1-R13, 2007. https://doi.org/10.1088/0953-2048/20/1/R01
  4. B. A. Glowacki, M. Majoros, M. Vickers, J. E. Evetts, Y. Shi and I. McDougall, "Superconductivity of powder-in-tube MgB2 wires," Supercond. Sci. Technol., vol. 14, pp. 193-199, 2001 https://doi.org/10.1088/0953-2048/14/4/304
  5. S. X. Dou, S. Soltanian, J. Horvat, X. L. Wang, S. H. Zhou, M. Ionescu, and H. K. Liu, P. Munroe, M. Tomsic, "Enhancement of the critical current density and flux pinning of MgB2 superconductor by nanoparticle SiC doping," Appl. Phys. Lett., vol. 81, pp. 3419-3421, 2002. https://doi.org/10.1063/1.1517398
  6. B.-H. Jun, Y.-J. Kim, K. S. Tan and C.-J. Kim, "Effective carbon incorporation in MgB2 by combining mechanical milling and the glycerin treatment of boron powder," Supercond. Sci. Technol., vol. 21, 105006, 2008. https://doi.org/10.1088/0953-2048/21/10/105006
  7. M. Haruta, T. Fujiyoshi, T. Sueyoshi, K. Miyahara, T, Ikegami, K. Ebihara, R. Miyagawa, N. Ishikawa, S. Awaji, k. Watanabe, "Influence of columnar defects on pinning parameters in high-Tc superconductors", Physica C, vol. 412-414, pp. 511-514, 2004. https://doi.org/10.1016/j.physc.2004.02.194
  8. D. Behera, T. Mohanty, S.K. Dash, T. Banerjee, D. Kanjilal, N.C. Mishra, "Effect of secondary electrons from latent tracks created in YBCO by swift heavy ion irradiation", Radiation measurement, vol. 36, pp. 125-129, 2003. https://doi.org/10.1016/S1350-4487(03)00108-2
  9. Y. H. Herr, K.-H. Lee, C.-J. Kim, H.-G. Lee, C.-T. Kim, G.-W. Hong, D.-Y. Won, "Effect of neutron irradiation on Tc of Pb-doped BiSrCaCuO superconductor," Jpn. J. Appl. Phys., vol. 28, No. 9, L1561-L1563, 1989. https://doi.org/10.1143/JJAP.28.L1561
  10. Y. J. Lee, J. H. Choi, B.-H. Jun, J. Joo, C. S. Kim, and C.-J. Kim, "Effects of electron beam irradiation on the superconducting properties of YBCO thin films," Prog. Supercond. Cryogen., vol. 18, pp. 15-20, 2016. https://doi.org/10.9714/psac.2016.18.4.015
  11. C.-J. Kim, Y. J. Lee, I. H. Cho and B.-H. Jun, "Superconducting properties and microstructure of electron beam irradiated MgB2 superconductors," Prog. Supercond. Cryogen., vol. 24, pp. 18-22, 2022.
  12. T. Yano, M. Pekala, A. Q. He, A. Wisniewski, M. L. Jenkins, "Microstructural observations on neutron-irradiated YBa2Cu4O8 superconductor", Physca C, vol. 247, pp. 55-61, 1995 https://doi.org/10.1016/0921-4534(95)00190-5
  13. M. Akiyoshi, K. Hashimoto, T. Yano, "Neutron- and electronirradiation effects on the microstructure of YBa2Cu4O8 observed by HREM", Physica C, vol. 338, pp. 103-109, 2000. https://doi.org/10.1016/S0921-4534(00)00210-0
  14. M. Eisterer, M. Zehetmayer, S. Tonier, H. W. Weber, M. Kambara, N. Hari Babu, D. A. Cardwell and L. R. Greenwood, "Neutron irradiation of MgB2 bulk superconductors", Supercond. Sci. Technol., vol. 15, pp. L9-L12 2002. https://doi.org/10.1088/0953-2048/15/2/101
  15. S. Okayasu, M. Sasase, K. Hojou, Y. Chimi, A. Iwase, H. Ikeda, R. Yoshizaki, T. Kambara, H. Sato, Y. Hamatani, A. Madeda, "Irradiation effects on MgB2 bulk samples and formation of columnar defects in high-Tc superconductor", Physica C, vol. 382 pp.104-107, 2002. https://doi.org/10.1016/S0921-4534(02)01206-6
  16. M. A. Kirl, "Structure and flux pinning properties of irradiation defects in YBa2Cu3O7-x", Cryogenics, vol. 33. 235-242, 1993. https://doi.org/10.1016/0011-2275(93)90037-O
  17. R. Kumar, H. M. Agrawal, R. P. S. Kushwaha and D. Kanjilal, "Enhancement of critical current density of MgB2 thin film irradiated with 200 MeV Au ions", Supercond. Sci. Technol., vol. 19, pp. 1047-1050, 2006. https://doi.org/10.1088/0953-2048/19/10/010
  18. D. N. Kim, B.-H. Jun, S.-D. Park, C.-J. Kim, and H. W. Park, "Effects of the size of Mg powder on the formation of MgB2 and the superconducting properties," Prog. Supercond. Cryogen., vol. 18, pp. 9-14, 2016. https://doi.org/10.9714/psac.2016.18.4.009
  19. B.-H. Jun and C.-J. Kim, "The effect of heat-treatment temperature on the superconducting properties of malic acid-doped MgB2/Fe wire." Supercond. Sci. Technol., Vol. 20, Issue 10, pp. 980-985, 2007. https://doi.org/10.1088/0953-2048/20/10/015
  20. G. Nishijima, S. J. Ye, A. Matsumoto, K. Togano, H. Kumakura, H. Kitaguchi, and H. Oguro, "Mechanical properties of MgB2 superconducting wires fabricated by internal Mg diffusion process," Supercond. Sci. Technol., vol. 25, 054012, 2012. https://doi.org/10.1088/0953-2048/25/5/054012
  21. Vickers hardness test: https://en.wikipedia.org/wiki/Vickers_hardness_test
  22. Crytal structure of Copper: https://en.wikipedia.org/wiki/Copper
  23. Crytal structure of Niobium: https://en.wikipedia.org/wiki/Niobium
  24. E. W. H. Kan, W. K. Choi, C. C. Leoy, and W. K. Chim, "Effect of annealing profile on defect annihilation, crystallinity and size distribution of germanium nanodots in silicon oxide matrix," Appl. Phys. Lett. 83, 2058, 2003. https://doi.org/10.1063/1.1608480
  25. K. Togano, J. M. Hur, A. Matsumoto and H. Kumakura, "Fabrication of seven-core multi-filamentary MgB2 wires with high critical current density by an internal Mg diffusion process," Supercond. Sci. Technol., Vol. 22, 015003, 2009. https://doi.org/10.1088/0953-2048/22/1/015003
  26. K. Tachikawa, Y. Yamada, K. Katagiri, H. Kumakura, A. Iwamoto, and K. Watanabe, "Effects of Metal Powder Addition in Ni-Sheathed PIT MgB2 Tapes," AIP Conference Proceedings, vol. 711, pp. 561, 2004.