Fabrication and Characteristic Tests of a Novel Low-Resistance Joint Structure for YBCO Coated-Conductors

Miao, Qingying; Zhu, Jiamin; Cheng, Mengzeng; Zhang, Z.; Li, Z. Y.; Wang, Y.; Sheng, Jie; Jin, Zhijian; Hong, Zhiyong

doi:10.1109/tasc.2014.2365694

Cited by 16 publications

(5 citation statements)

References 12 publications

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“…An overcurrent of 1200 A (in 100 ms) can be applied at 77 K on the tape with stainless steel lamination, while the room temperature resistance is also adjustable by optimizing the thickness combination of the stainless steel and copper stabilizer. Low resistivity; potential for higher J e 1-3 nΩ Technical support the characteristics, some of which have been published [27][28][29].…”

Section: Lamination and Jointing Techniques Of The Superconducting Tapementioning

confidence: 81%

Progress in fabrication of second generation high temperature superconducting tape at Shanghai Superconductor Technology

Zhao

Zhu

Jiang

et al. 2019

Supercond. Sci. Technol.

107

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The development and application of second generation high temperature superconducting (2G-HTS) tapes have attracted much attention in China recently. Progress in upscaling high performance 2G-HTS tape production at Shanghai Superconductor Technology (SST) is reported in this paper. With ion beam assisted deposition, biaxially textured buffer layers with a configuration of CeO 2 /LaMnO 3 /MgO/Y 2 O 3 /Al 2 O 3 /C-276 have successfully been fabricated. In-plane and out-ofplane texture degrees of CeO 2 films achieve 2°-4°and 2°, respectively. A multi-plume multi-turn pulsed laser deposition (PLD) system combined with the so-called 'radiation assisted conductive heater' has been proposed and further developed for REBCO layer deposition. Our effort was focused on minimizing the temperature variations in the deposition region by modifying the heating shield that assists the conductive heater of the drum-like cylinder. A tape travelling speed of 100-180 m h −1 can be achieved with a steady temperature profile when passing through the deposition zone, which is very beneficial for the growth of the REBCO layer. Taking advantage of the liquid phase growth mode, several compositions of superconducting films with a thickness in the range of 1-2.5 μm have been grown with high growth rates of over 40 nm s −1 . Furthermore, the microstructures and superconducting performance were investigated in detail. Based on these studies, superconducting tapes with piece lengths of up to 500 meters have been developed. High I c values at 77 K, self-field (over 520 A cm −1 width) or at low temperature, high magnetic field conditions (over 560 A/4 mm width at 4.2 K, 10 T, perpendicular field) have been achieved. Lamination and jointing techniques have also been developed by SST for power and magnet applications.

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Section: Lamination and Jointing Techniques Of The Superconducting Tapementioning

confidence: 81%

Progress in fabrication of second generation high temperature superconducting tape at Shanghai Superconductor Technology

Zhao

Zhu

Jiang

et al. 2019

Supercond. Sci. Technol.

107

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“…Therefore, each coil has about 300 superconductor-superconductor joints and low resistance joint technique become a critical issue for this industry-scale HTS magnet. In this case, an extra low resistance joint technique was developed by using bridge soldering method to obtain one joint resistance with an order of 10 nΩ [33]. This joint technique has also been applied on other HTS magnets to reduce their total joint resistance.…”

Section: Hts Magnet For the Heater A Hts Magnet Design Specif Imentioning

confidence: 99%

Development and Test of One Commercial Megawatt Superconducting DC Induction Heater With Extra High Energy Efficiency

Dai

Yan

Hong³

et al. 2021

IEEE Access

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“…The connection layer between two YBCO layers consists of many sublayers (such as stabilizer layers and protection layers), interfacial resistance, and joining materials [24]. The mathematical conversion process from a multilayer structure to a single layer structure is described here.…”

Section: Fundamental Theorymentioning

confidence: 99%

An equivalent homogenized model for non-superconducting joints made by ReBCO coated conductors

Pan¹,

Wu²,

Sheng³

et al. 2018

Supercond. Sci. Technol.

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The most popular method of reducing joint resistance R j is by increasing overlap length l. A numerical model capable of simulating the relationship between joint resistance and overlap length (the log(R j )-log(l) curve) could provide guidance for commercial high temperature superconducting joint manufacturing and may shed light on some more detailed behavior. In this study, a threedimensional model with an equivalent single homogeneous layer, characterized by resistance per unit area ρ s (Ω m 2 ), is developed and tested against experimental data. With this model, detailed measurement of parameters such as the thickness and resistivity of each layer and the interfacial resistance are not necessary. The log(R j )-log(l) relationship, especially for longer joints (l>20 cm), can be predicted by employing only ρ s , which can be experimentally and accurately obtained from shorter joints (l20 cm). The log(R j )-log(l) curve exhibits a nonlinear relationship when the overlap length exceeds a certain threshold value, in contrast to the commonly considered R j =ρ s /wl relationship (where w is the width of the joining area). This result is validated by accurately measuring the resistance of soldered joints with overlap lengths of 5-90 cm. The sensitivity of simulation results by different n values, I j /I c , and meshing precision levels are also presented.

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Fabrication and Characteristic Tests of a Novel Low-Resistance Joint Structure for YBCO Coated-Conductors

Cited by 16 publications

References 12 publications

Progress in fabrication of second generation high temperature superconducting tape at Shanghai Superconductor Technology

Progress in fabrication of second generation high temperature superconducting tape at Shanghai Superconductor Technology

Development and Test of One Commercial Megawatt Superconducting DC Induction Heater With Extra High Energy Efficiency

An equivalent homogenized model for non-superconducting joints made by ReBCO coated conductors

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