https://doi.org/10.1140/epjs/s11734-024-01366-1
Regular Article
Study on the property and microstructure of NbTiTa superconducting wire
1
Northwestern Polytechnical University, 710072, Xi’an City, Shaanxi Province, China
2
Western Superconducting Technologies Co., Ltd, 710018, Xi’an City, Shaanxi Province, China
3
Northwest Institute for Non-Ferrous Metal Research, 710018, Xi’an City, Shaanxi Province, China
Received:
18
July
2024
Accepted:
29
September
2024
Published online:
28
October
2024
NbTi superconducting Wire exhibits the advantages of excellent processing characteristics, stable superconducting properties and low cost. It has been widely applied and extensively used for low magnetic fields of < 9 T. To expand the application range in higher magnetic fields, it is vital to improve the upper critical fields (Hc2) and the critical current density (Jc) at high magnetic fields (≥ 9 T) of NbTi superconducting material. This study aims to add Ta element, obtaining both higher Jc and higher upper critical fields (Hc2). After the addition of Ta element, the critical current density of NbTiTa superconducting wire reaches 681.3, 527.5, and 381.4 A/mm2 at (4.2 K, 9 T), (4.2 K, 9.5 T) and (4.2 K, 10 T), respectively and the upper critical field Hc2 is also higher than that of NbTi superconducting wire. In addition, the NbTiTa superconducting wire also exhibits the striking second magnetization peak effect at high fields, and the flux pinning mechanism changes from the surface pinning at low fields to the Δκ pinning at high fields. This study demonstrates that the NbTiTa superconducting wire can expand the application range in higher magnetic fields (≥ 9 T) by improving the critical current density at high magnetic fields (≥ 9 T) and the upper critical fields of the NbTi superconducting wire.
Copyright comment Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
© The Author(s), under exclusive licence to EDP Sciences, Springer-Verlag GmbH Germany, part of Springer Nature 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
