Hundred-meter-scale MgB2 multi-filament wires with Cu stabilizer fabricated by internal Mg diffusion process

被引：0

作者：

Yu, Qihang ^{[1
]}

Yang, Fang ^{[1
]}

Wang, Qingyang ^{[2
]}

Wang, Yiming ^{[2
]}

Wu, Bo ^{[3
]}

Yan, Guo ^{[3
]}

Feng, Yong ^{[3
]}

Zhang, Pingxiang ^{[1
,2
]}

机构：

[1] Northwestern Polytech Univ, Inst Superconducting Mat & Appl Technol, Xian 710072, Peoples R China

[2] Northwest Inst Nonferrous Met Res, Xian 710016, Peoples R China

[3] Western Superconducting Technol Co Ltd, Xian 710018, Peoples R China

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2025年 / 38卷 / 02期

基金：

中国国家自然科学基金;

关键词：

multi-filament MgB2 wires; Cu-stabilizer; internal Mg diffusion; superconducting properties;

D O I：

10.1088/1361-6668/adab2d

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The high stability and current carrying properties of multi-filament long wires are fundamental to applying MgB(2 )superconducting materials. To ensure the current carrying properties and enhance stability, we utilized the internal Mg diffusion (IMD) process to fabricate different structures of Cu-stabilized, hundred-meter-scale MgB2 wires: 7-filament, 6 + 1-filament, 12 + 7-filament, 18 + 1-filament, 30 + 7-filament, and 36 + 1-filament. We characterized both the current carrying properties and the three-dimensional structure of these wires. The experimental results reveal that the current carrying properties strongly correlate with the integrity of the Nb barrier layer. In the 7-filament wire, the intact Nb barrier layer prevents contamination of the MgB2 superconducting phase, leading to a critical current density (Jc) of 4.16 x 105 A cm(-2 )at 4.2 K and 4 T. This study provides a foundation for the application of MgB2 superconducting wire.

引用

页数：10

共 41 条

[11] Iwasa Y., 2006, Case Studies in Superconducting Magnets: Design and Operational Issues
[12] Influence of boron powder purification on the connectivity of bulk MgB2
Jiang, J.
Senkowicz, B. J.
Larbalestier, D. C.
Hellstrom, E. E.
[J]. SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2006, 19 (08) : L33 - L36
[13] Relation between constituent material fraction in multifilamentary MgB2 wires and requirements for MRI magnets
Kodama, Motomune
Kotaki, Hiroshi
Suzuki, Takaaki
Tanaka, Hideki
[J]. SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2022, 35 (09)
[14] Feasibility study of novel rapid ramp-down procedure in MgB2 MRI magnet using persistent current switch with high off-resistivity
Kodama, Motomune
Kotaki, Hiroshi
Ohara, Shinya
Ichiki, Yota
Fujita, Shinji
Suzuki, Takaaki
Tanaka, Hideki
Aoki, Manabu
[J]. SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2021, 34 (07)
[15] Influence of filament number and size on the basic properties of in situ made MgB2 wires
Kovac, P.
Berek, D.
Melisek, T.
Kovac, J.
Husek, I
Buran, M.
Lee, D. G.
Choi, J. H.
[J]. SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2023, 36 (04)
[16] Current densities and strain tolerances of filamentary MgB2 wires made by an internal Mg diffusion process
Kovac, P.
Kopera, L.
Kovac, J.
Melisek, T.
Haessler, W.
Wang, D.
Ma, Y.
[J]. SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2019, 32 (09)
[17] Filamentary MgB2 wires manufactured by different processes subjected to tensile loading and unloading
Kovac, P.
Kulich, M.
Kopera, L.
Melisek, T.
Kovac, J.
Husek, I.
[J]. SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2017, 30 (06)
[18] Reactivity of sheath materials with Mg/B in MgB2 conductor fabrication
Kumar, R. G. Abhilash
Vinod, K.
Varghese, Neson
Syamaprasad, U.
[J]. SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2007, 20 (03) : 222 - 227
[19] The critical current density of advanced internal-Mg-diffusion-processed MgB2 wires
Li, G. Z.
Sumption, M. D.
Susner, M. A.
Yang, Y.
Reddy, K. M.
Rindfleisch, M. A.
Tomsic, M. J.
Thong, C. J.
Collings, E. W.
[J]. SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2012, 25 (11)
[20] Critical current densities and n-values of MgB2 strands over a wide range of temperatures and fields
Li, G. Z.
Yang, Y.
Susner, M. A.
Sumption, M. D.
Collings, E. W.
[J]. SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2012, 25 (02)

← 1 2 3 4 5 →