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<p>Bi-2223 superconducting tapes exhibit exceptional potential for high-field magnet applications due to their high critical transition temperature and upper critical magnetic field. However, its practical application is limited by mechanical degradation under combined electro-mechanical, thermal, and magnetic stresses. This study demonstrates a significant improvement in the electro-mechanical properties of Bi-2223 tapes through optimized Cu electrodeposition coatings. Experimental results reveal an 82% enhancement in irreversible stress limits for tapes with a 60&#xa0;μm Cu coating compared to uncoated counterparts. Furthermore, systematic evaluation of the engineering critical current density across tapes with varying Cu coating thicknesses (0–60&#xa0;μm) identifies optimal coating strategies for distinct stress regimes: uncoated tapes outperform in low-stress conditions (0–87&#xa0;MPa), while 30&#xa0;μm, 45&#xa0;μm, and 60&#xa0;μm coatings prove most effective for intermediate (87–94&#xa0;MPa), high (94–124&#xa0;MPa), and extreme (&gt; 124&#xa0;MPa) stress ranges, respectively. These findings provide a scientifically grounded framework for tailoring Bi-2223 tapes to withstand operational stresses in next-generation superconducting magnets.</p>

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Enhancement of electro-mechanical properties in Bi-2223 superconducting tapes by electrodeposited Cu coating

  • 期刊论文

  • 发表日期：

    2025年10月27日

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  • Lang Jiang,
  • Yanhong Bi,
  • Shengnan Zhang,
  • Jing Liu,
  • Weichang Guo,
  • Jianfen Li,
  • Pingxiang Zhang

摘要

Bi-2223 superconducting tapes exhibit exceptional potential for high-field magnet applications due to their high critical transition temperature and upper critical magnetic field. However, its practical application is limited by mechanical degradation under combined electro-mechanical, thermal, and magnetic stresses. This study demonstrates a significant improvement in the electro-mechanical properties of Bi-2223 tapes through optimized Cu electrodeposition coatings. Experimental results reveal an 82% enhancement in irreversible stress limits for tapes with a 60 μm Cu coating compared to uncoated counterparts. Furthermore, systematic evaluation of the engineering critical current density across tapes with varying Cu coating thicknesses (0–60 μm) identifies optimal coating strategies for distinct stress regimes: uncoated tapes outperform in low-stress conditions (0–87 MPa), while 30 μm, 45 μm, and 60 μm coatings prove most effective for intermediate (87–94 MPa), high (94–124 MPa), and extreme (> 124 MPa) stress ranges, respectively. These findings provide a scientifically grounded framework for tailoring Bi-2223 tapes to withstand operational stresses in next-generation superconducting magnets.