Interface effects on the current transport properties of multi-layered (Ba, K)Fe<sub>2</sub>As<sub>2</sub> superconducting wires

Yao, Chao; Guo, Wenwen; Zhu, Yanchang; Liu, Xinyuan; Han, Meng; Liu, Fang; Liu, Huajun; Qin, Jinggang; Zheng, Jinxing; Ma, Yanwei

doi:10.1039/d2tc04111a

Cited by 4 publications

(1 citation statement)

References 61 publications

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“…High isotropic pressure up to 200 MPa results in the radial contraction of the whole wire and an almost 100% dense superconducting filament. Since then, the HIP method has gained widespread acceptance as an essential approach for the post-annealing of both the round wires and the solenoid coils made from them [20][21][22][23]. Nevertheless, it was soon recognized that the core density is not the only necessity for high J c [24,25].…”

Section: Introductionmentioning

confidence: 99%

High critical current density in low-cost iron-based superconducting round wires annealed at ambient pressure

Fu,

Dong,

et al. 2024

Supercond. Sci. Technol.

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Superconducting round wires with isotropic architecture are preferred in fabrications of cables and magnets. To diminish the obstacles to supercurrent, e.g., voids, cracks and bubbles, over-pressure heat treatment or hot isostatic pressing is indispensable in the final annealing process. Here, we fabricated a stainless steel/Cu/Ag sheathed Ba0.6K0.4Fe2As2 superconducting round wire without the aid of high-pressure sintering. It was found that high-strength outer sheaths and groove rolling synergistically enhance the core density to ~100 %. Combined with the fiber and concentric texture of the superconducting core, the Jc reaches 4.45×104 A/cm2 at 4.2 K and 10 T. Furthermore, the specially designed conductor architecture not only reduces material costs by lowering the proportion of Ag to ~3.1 %, but also provides high mechanical and thermal stability. This straightforward and cost-effective process can be scaled up for the massive production of long wires for high-field applications.

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Section: Introductionmentioning

confidence: 99%

High critical current density in low-cost iron-based superconducting round wires annealed at ambient pressure

Fu,

Dong,

et al. 2024

Supercond. Sci. Technol.

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Formation and modulation mechanisms of Fe-As phases in melting-processed Ba(Fe1-xCox)2As2 superconductor

Tang,

Dong,

et al. 2024

Acta Materialia

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Towards high-field applications: high-performance, low-cost iron-based superconductors

Dong,

Xu,

2024

National Science Review

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High magnetic fields play a crucial role in advancing basic sciences, fusion energy, and magnetic resonance imaging systems. However, the widespread use of high-field magnets requires affordable high-temperature superconducting wires that can carry large supercurrents. Iron-based superconductors offer an economically attractive solution to push forward important yet costly scientific programs, such as nuclear fusion reactors and next-generation particle accelerators. In this review, we start with the fabrication of iron-based superconducting wires and tapes and continue to discuss several key factors governing the current transport properties. State-of-the-art wires and tapes are introduced with emphasis on grain boundary characteristics, flux pinning, and anisotropy. The flexible conductor architecture enables low cost, large mechanical strength, and high thermal stability. Recent progress in practical applications, including superconducting joints and insert coils, is also reviewed. Finally, we propose several key questions faced by iron-based superconductors in future practical applications.

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Interface effects on the current transport properties of multi-layered (Ba, K)Fe₂As₂ superconducting wires

Abstract: Iron-based superconductors (IBS) are very promising candidates for high-field applications owing to their ultrahigh upper critical field and very small electromagnetic anisotropy. For practical applications, it is essential to develop...

Cited by 4 publications

References 61 publications

High critical current density in low-cost iron-based superconducting round wires annealed at ambient pressure

High critical current density in low-cost iron-based superconducting round wires annealed at ambient pressure

Formation and modulation mechanisms of Fe-As phases in melting-processed Ba(Fe1-xCox)2As2 superconductor

Towards high-field applications: high-performance, low-cost iron-based superconductors

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Interface effects on the current transport properties of multi-layered (Ba, K)Fe2As2 superconducting wires

Abstract: Iron-based superconductors (IBS) are very promising candidates for high-field applications owing to their ultrahigh upper critical field and very small electromagnetic anisotropy. For practical applications, it is essential to develop...

Cited by 4 publications

References 61 publications

High critical current density in low-cost iron-based superconducting round wires annealed at ambient pressure

High critical current density in low-cost iron-based superconducting round wires annealed at ambient pressure

Formation and modulation mechanisms of Fe-As phases in melting-processed Ba(Fe1-xCox)2As2 superconductor

Towards high-field applications: high-performance, low-cost iron-based superconductors

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Product

Resources

About

Interface effects on the current transport properties of multi-layered (Ba, K)Fe₂As₂ superconducting wires