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http://dx.doi.org/10.9714/psac.2021.23.4.014

Fabrication of MgB2 superconducting wires with advanced Mg-Powder-Compaction process  

Oh, S.H. (Korea Institute of Materials Science)
Oh, Y.S. (Korea Institute of Materials Science)
Jang, S.H. (Kiswire Advanced Technology Ltd.)
Moon, Y.H. (Pusan National University)
Chung, K.C. (Korea Institute of Materials Science)
Kang, S.H. (Korea Institute of Materials Science)
Publication Information
Progress in Superconductivity and Cryogenics / v.23, no.4, 2021 , pp. 14-18 More about this Journal
Abstract
The Mg-Powder-Compaction (MPC) process is proposed to fabricate the MgB2 superconducting wires. Mg powder wall, similar to the Mg metal tube, inside the Nb outer sheath has been made and the stochiometric B powder was inserted into the wall. Even though the very high MgB2 core density of 2.53 g/cm3 is obtained, the superconducting area fraction of MgB2 is not high enough for the applications. In this work, an advanced MPC process was adopted by adding Mg powder into B powder. The Mg powder wall in the initial wire was fabricated by controlling the wall thickness while maintaining a constant density, and the mixture of B and Mg powder was filled into the Mg powder wall with the same filling density. It is found that the reduction in the area of the Mg powder wall proceeds similar to the wire, and the Mg powder wall is well maintained at the final wire diameter, which is advantage for the fabrication of long wires. With the advanced MPC process, as the added Mg is increased the densities of MgB2 core is decreased and the porous structure is formed, it is found that the area fraction of superconducting MgB2 increase up to the 37.7 % with the improved high critical current density (Jc) and the engineering critical current density (Je).
Keywords
$MgB_2$; wires; Mg-Powder-Compaction(MPC) process; $MgB_2$ area; critical current;
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  • Reference
1 G. Giunchi, "The Reactive Liquid Infiltration (RLI) Technique for the Bulk Reaction to MgB2," MgB2 Superconducting Wires: Basics and Applications, pp. 159-208, 2016
2 H. Kumakura, "Development of high performance MgB2 tapes and wires," Journal of the Physical Society of Japan, vol. 81, no.1, pp. 011010, 2011   DOI
3 X. Xu, W. Li, X. Wang, and S.X. Dou, "Superconducting properties of graphene doped magnesium diboride," Applications of High-Tc Superconductivity, pp. 201-218, 2011
4 R. Flukiger, H. Suo, N. Musolino, C. Beneduce, P. Toulemonde, and P. Lezza, "Superconducting properties of MgB2 tapes and wires," Physica C: Superconductivity, vol. 385, pp. 286-305, 2003   DOI
5 P. Sunwong, J. Higgins, Y. Tsui, M. Raine, and D. Hampshire, "The critical current density of grain boundary channels in polycrystalline HTS and LTS superconductors in magnetic fields," Superconductor Science and Technology, vol. 26, no.9, pp. 95006, 2013   DOI
6 M. Kulich, P. Kovac, M. Hain, A. Rosova, and E. Dobrocka, "High density and connectivity of a MgB2 filament made using the internal magnesium diffusion technique," Superconductor Science and Technology, vol. 29, no.3, pp. 035004, 2016   DOI
7 A.V. Pan, S. Zhou, H. Liu, and S. Dou, "Properties of superconducting MgB2 wires: in situ versus ex situ reaction technique," Superconductor Science and Technology, vol. 16, no.5, pp. 639, 2003   DOI
8 J. Nagamatsu, N. Nakagawa, T. Muranaka, Y. Zenitani, and J. Akimitsu, "Superconductivity at 39 K in magnesium diboride," nature, vol. 410, no. 6824, pp. 63-64, 2001   DOI
9 J. Hur, K. Togano, A. Matsumoto, H. Kumakura, H. Wada, and K. Kimura, "Fabrication of high-performance MgB2 wires by an internal Mg diffusion process," Superconductor Science and Technology, vol. 21, no.3, pp. 032001, 2008   DOI
10 M. Son, N. Kaneda, M. Kanazawa, Y. Yamada, and K. Tachikawa, "Superconducting properties and structures of MgB2 wires prepared by external diffusion method," Journal of Advanced Science, vol. 26, pp. 32-35, 2014   DOI
11 V. Chabanenko, R. Puzniak, A. Nabialek, S. Vasiliev, V. Rusakov, L. Huanqian, R. Szymczak, H. Szymczak, J. Jun, and J. Karpinski, "Flux jumps and HT diagram of instability for MgB 2," Journal of low temperature physics, vol. 130, no. 3, pp. 175-191, 2003   DOI
12 Y. Kimishima, S. Takami, T. Okuda, M. Uehara, T. Kuramoto, and Y. Sugiyama, "Complete flux jump in bulk MgB2 sintered under high pressure," Physica C: Superconductivity and its applications, vol. 463, pp. 281-285, 2007   DOI
13 D. Wang, D. Xu, X. Zhang, C. Yao, P. Yuan, Y. Ma, H. Oguro, S. Awaji, and K. Watanabe, "Uniform transport performance of a 100 m-class multifilament MgB2 wire fabricated by an internal Mg diffusion process," Superconductor Science and Technology, vol. 29, no. 6, pp. 065003, 2016   DOI