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Fabrication of Thick REBCO–Coated Conductors with High Performance on Metal Tapes by Pulsed Laser Deposition Process

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Abstract

High-quality long REBCO-coated conductors have been successfully fabricated on flexible metal substrates by pulsed laser deposition (PLD). Although thinner REBCO films had a very high critical current density J c of 5.0 × 10 6 A/cm 2 (at 77 K, in zero magnetic field), J c of thick films decreased to less than 3.0 × 10 6 A/cm 2 as the thickness increased over 1 μm. In order to improve superconducting properties of REBCO thick films, microstructure and surface morphology of different thick REBCO films were systematically analyzed to understand the relationship between J c and epitaxial growth process. X-ray diffraction (XRD) analysis showed that thick REBCO films still had pure c-axis orientation by Gd substitution and Y 2 O 3 doping. Scanning electron microscope (SEM) images showed thick REBCO films with high J c had sub-micrometer size grains and narrow grain-boundaries. Our experimental results showed REBCO thick films with I c of 780 A/cm could be obtained. Hundred meters long coated conductor tapes with 500 A/cm have been routinely fabricated. And now, the process optimization for kilometer long coated conductor tapes is underway.

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Acknowledgments

This research is sponsored by the Youth Fund of Natural Science Foundation of China (Grant No. 11204174), the International Thermonuclear Experimental Reactor (ITER) Plan (Grant. No. 2011GB113004), and the Shanghai Science and Technology Committee (Grant No. 11DZ1100402).

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Authors and Affiliations

  1. Department of Physics and Astronomy, Shanghai Jiao Tong University, 800 Dong Chuan Road, 200240, Shanghai, People’s Republic of China

    Linfei Liu, Yiyie Li, Guina Xiao & Xiang Wu

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  1. Linfei Liu
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  2. Yiyie Li
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  3. Guina Xiao
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  4. Xiang Wu
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Correspondence to Yiyie Li.

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Liu, L., Li, Y., Xiao, G. et al. Fabrication of Thick REBCO–Coated Conductors with High Performance on Metal Tapes by Pulsed Laser Deposition Process. J Supercond Nov Magn 28, 403–406 (2015). https://doi.org/10.1007/s10948-014-2730-x

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  • DOI: https://doi.org/10.1007/s10948-014-2730-x

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