Superconducting properties of MgB2 wires and tapes with different metal sheaths

Feng, Yang; Guo, Yan; Zhao, Yong; Liu, C.F.; Fu, B.Q.; Zhou, Lian; Cao, Lei; Ruan, Keqing; Li, X.G.; Shi, Lei; Zhang, Y.H.

doi:10.1016/s0921-4534(02)02169-x

Cited by 16 publications

(12 citation statements)

References 9 publications

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“…However, the conductors are commonly fabricated using the sheath material(s) consist of heavy elements (e.g. iron, stainless steel (SUS), niobium, nickel, copper, and tantalum) [3]- [7]; the reason essentially owes the difficulty in the fabrication of conductors with high performance of the critical current density, , in the magnetic fields, B, using the sheath material(s) consist of light elements (e.g. aluminum and magnesium).…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Ex-Situ${\hbox{MgB}}_{2}/{\hbox{Al}}$ Tapes and the Effects of In and SiC Addition

Kitaguchi

Nakane²,

Kumakura³

2007

IEEE Trans. Appl. Supercond.

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Use of light metal(s) might enhance the possibility of MgB 2 conductors in applications. Therefore, we are developing MgB 2 tapes using aluminum sheath. As Mg and Al react very easily at high temperatures, we applied an ex-situ PIT process to fabricate MgB 2 Al tapes. We have reported that the usage of MgB 2 powder prepared from MgH 2 and amorphous B improves J performance of ex-situ tapes and that we fabricated MgB 2 Al tape with J (@4.2 K, 4 T) of 8,600 A cm 2 . In this paper, we examine the reproducibility of J in the ex-situ MgB 2 Al tapes using the MgB 2 powder prepared from MgH 2 and amorphous B. We fabricated a new series of MgB 2 Al tape and J (@4.2 K, 4 T) reaches 11,000 A cm 2 . We also investigate the effects of indium and/or SiC addition to the ex-situ MgB 2 Al tapes.Index Terms-Critical current densities (J ), critical temperature (T ), magnesium diboride (MgB 2 ), PIT (powder-in-tube) process, superconducting tapes.

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Section: Introductionmentioning

confidence: 99%

Fabrication of Ex-Situ${\hbox{MgB}}_{2}/{\hbox{Al}}$ Tapes and the Effects of In and SiC Addition

Kitaguchi

Nakane²,

Kumakura³

2007

IEEE Trans. Appl. Supercond.

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“…1) The NIN group initiated investigation on MgB 2 powder, wire, bulk and magnets in 2001 [80], and prepared the Fig. 9.…”

Section: Progress Of Other Superconducting Materialsmentioning

confidence: 99%

Enabling High-Temperature Superconducting Technologies Toward Practical Applications

Jin

Xin

Wang

et al. 2014

IEEE Trans. Appl. Supercond.

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This work covers the high-temperature superconducting (HTS) technologies based on the highlights in recent achievements in the applied HTS field in China. Its comprehensive coverage includes practical HTS material manufacturing and characterization, large-scale applications, and electronic applications. The applied HTS technologies have been well enabled to build applicable devices, and their characteristics have been well verified in the HTS devices developed to be industrialized for practical applications. The highlighted HTS devices and their performance details reveal the trend and the necessary improvement required to reach the goal of industrial applications of HTS technologies. Index Terms-High-temperature (T c ) superconductor (HTS), HTS cable, HTS electronic device, HTS fault-current limiter, HTS large-scale application, HTS magnet, HTS measurement technique, HTS motor, HTS MRI, HTS strong current device, HTS transformer, HTS 2G wire. J. X. Jin is with the

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“…Some metals and alloys have been used for sheath materials such as Fe [24], Cu [25], Ti [26], Ag [27], Ni [28], Ta [29], stainless steel [30], Fe/stainless steel [31], Cu-Ni [32,33] and CuSn [34] in the PIT process. The sheath materials should have some properties such as chemical compatibility with the MgB 2 core, ductility for mechanical deformation, high thermal and electrical conductivities and low cost.…”

Section: Introductionmentioning

confidence: 99%

Optimization of fabrication conditions of MgB2/Fe superconducting tapes using response surface methodology

Yücel

Belenli

2012

J Mater Sci: Mater Electron

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We have optimized fabrication conditions of MgB 2 /Fe superconducting monofilament tapes fabricated using ex-situ powder-in-tube method without any intermediate annealing. Influences of three effective parameters (annealing temperature, annealing time and argon (Ar) gas atmosphere pressure during the heat treatments) on the transport critical current densities (J c ) were investigated. The samples were characterized using X-ray diffraction, scanning electron microscope, energy dispersive X-ray spectrometer, optical microscope, critical transition temperature and J c measurements. Response surface methodology was used to optimize the conditions for the maximum J c of the samples and to understand the significance and interaction of the factors affecting J c . 3-level-3-factor central composite design was employed to evaluate the effects of the fabrication conditions parameters such as annealing temperatures (850-950°C), annealing times (30-120 min.) and Ar pressures (1-5 bars) on J c of the samples. Based on the analysis of ridge max, the optimum fabrication conditions were as follows: annealing temperature 948°C, annealing time 58 min. and Ar pressure 3 bars.

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Superconducting properties of MgB2 wires and tapes with different metal sheaths

Cited by 16 publications

References 9 publications

Fabrication of Ex-Situ${\hbox{MgB}}_{2}/{\hbox{Al}}$ Tapes and the Effects of In and SiC Addition

Fabrication of Ex-Situ${\hbox{MgB}}_{2}/{\hbox{Al}}$ Tapes and the Effects of In and SiC Addition

Enabling High-Temperature Superconducting Technologies Toward Practical Applications

Optimization of fabrication conditions of MgB2/Fe superconducting tapes using response surface methodology

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