Long RE123 coated conductors with high critical current over 500A/cm by IBAD/PLD technique

Kakimoto, K.; Igarashi, M.; Hanyu, S.; Sutoh, Y.; Takemoto, T.; Hayashida, T.; Hanada, Y.; Nakamura, N.; Kikutake, R.; Kutami, H.; Iijima, Y.; Saitoh, Takashi

doi:10.1016/j.physc.2011.05.091

Cited by 34 publications

(21 citation statements)

References 6 publications

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“…Since the discovery of a high temperature superconductor [1][2][3], lots of effort has been made to realize the HTS applications [4][5][6][7][8][9][10][11][12][13][14][15]. Among the applications, those using the HTS tape are expected as the promising ones, since the tapes could give a flexible shape for variable performances corresponding to the applications.…”

Section: Introductionmentioning

confidence: 99%

“…Although the development of the BSCCO tapes was preceded [11,12], a large-scaled development of CCs was started in FY1999 as the national project in Japan with expectation of the high potential of REBCO material [5,8,10]. Through the development of CCs of ten years, a length (L) and a critical current (I c ) had been drastically improved and the reasonable long tapes with high performance typically such as 200m-200 A/cm-width could be prepared [5,9,10]. This led to the start of a new national project of the M-PACC project [4,6].…”

Section: Introductionmentioning

confidence: 99%

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Progress in R＆D of coated conductor in M-PACC project

Izumi¹,

Ibi²,

Nakaoka³

et al. 2014

Progress in Superconductivity and Cryogenics

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The five-year national project in Japan for R&D of coated conductors and applications, named as the Materials and Power Applications of Coated Conductors (M-PACC) project, was finished at the end of FY2013. The project consists of four sub-themes as cable, transformer, SMES and coated conductors. In the theme of coated conductors, the fabrication process had been developed to satisfy the requirements from the applications such as in-field I c performance, low AC loss in the long tapes etc. Through the project, the remarkable progress was achieved as follows; a high in-field minimum I c value over 54A/cm-width under 3T at 77K was realized in a 200m long EuBCO tape with artificial pinning centers of BaHfO 3 by the pulsed laser deposition (PLD) technique on the IBAD template. On the other hand, the AC loss reduction was confirmed in the tapes fabricated by both PLD and the metal organic deposition (MOD) techniques by scribing 100m tapes into 10-filamments. Additionally, the mechanism of the delamination phenomenon was systematically investigated and the strength was improved by eliminating the origins of the weak points in the films. Through the development, all targeted goals were accomplished and the several results were appreciated as a world champion data.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Progress in R＆D of coated conductor in M-PACC project

Izumi¹,

Ibi²,

Nakaoka³

et al. 2014

Progress in Superconductivity and Cryogenics

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“…REBa 2 Cu 3 O x ((REBCO), RE ¼ rare earth) superconductor tapes made by epitaxial growth of REBCO thin films by vapor deposition and solution deposition methods on biaxially textured buffer layers on flexible metal substrates 1,2 are now produced in lengths of 500-1000 m by several institutions. [3][4][5][6][7] High critical current densities are being pursued in REBCO superconducting tapes in high magnetic fields (2-30 T) in a temperature range of 4.2 K-50 K for use of these materials in electric power applications such as motors, generators, superconducting magnetic energy storage (SMES) as well as in high energy particle accelerators, magnetic resonance imaging, and high-field magnets. Introduction of Y 2 BaCuO 5 , 8 BaZrO 3 (BZO), [9][10][11][12][13] BaSnO 3 ,14,15 BaHfO 3 , 16 Ba 2 YNbO 6 , 17,18 and Gd 3 TaO 7 19 nanoscale defects in the REBCO films of the superconducting tapes has been proven to be a powerful method to increase critical current density (J c ) of these tapes via enhanced flux pinning by these defects.…”

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confidence: 99%

High critical currents in heavily doped (Gd,Y)Ba2Cu3Ox superconductor tapes

Selvamanickam

Gharahcheshmeh

et al. 2015

Applied Physics Letters

113

100

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REBa2Cu3Ox ((REBCO), RE = rare earth) superconductor tapes with moderate levels of dopants have been optimized for high critical current density in low magnetic fields at 77 K, but they do not exhibit exemplary performance in conditions of interest for practical applications, i.e., temperatures less than 50 K and fields of 2–30 T. Heavy doping of REBCO tapes has been avoided by researchers thus far due to deterioration in properties. Here, we report achievement of critical current densities (Jc) above 20 MA/cm2 at 30 K, 3 T in heavily doped (25 mol. % Zr-added) (Gd,Y)Ba2Cu3Ox superconductor tapes, which is more than three times higher than the Jc typically obtained in moderately doped tapes. Pinning force levels above 1000 GN/m3 have also been attained at 20 K. A composition map of lift factor in Jc (ratio of Jc at 30 K, 3 T to the Jc at 77 K, 0 T) has been developed which reveals the optimum film composition to obtain lift factors above six, which is thrice the typical value. A highly c-axis aligned BaZrO3 (BZO) nanocolumn defect density of nearly 7 × 1011 cm−2 as well as 2–3 nm sized particles rich in Cu and Zr have been found in the high Jc films.

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“…with a few hundred meters length, have become commercialized [1]- [3]. In particular, Fujikura has developed over 570 A/cm at 77 K, s.f.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of a 426 kJ Cryocooled Magnet and a Model Magnet With REBCO Coated Conductors

Daibo

Fujita

Haraguchi

et al. 2014

IEEE Trans. Appl. Supercond.

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REBa 2 Cu 3 O x (REBCO, RE = rare earth) coated conductors are expected to show high performance for superconducting applications because of their high current density and high mechanical strength. Fujikura has developed REBCO coated conductor over 570 A/cm width at 77 K, self field with over 800 m length. In addition, we have succeeded in developing a 5 T cryocooled REBCO magnet with a stored energy of 426 kJ. The magnet is composed of 24 pancake coils with an inner diameter of 260 mm, and the total length of the REBCO coated conductors is approximately 7.2 km. We confirmed that the REBCO magnet could be excited up to 5 T for 720 min 9 months after the fabrication of the magnet. It is important to validate the long-term operation test results of the REBCO magnets with larger diameters in order to use these conductors in practical superconducting applications. On the other hand, we have fabricated and evaluated a model magnet before we fabricated a 426 kJ cryocooled magnet. The model magnet is composed of 6 REBCO pancake coils and 18 "dummy coils" with an inner diameter of 260 mm and an outer diameter of 515 mm. The model magnet is about the same size and shape as the 426 kJ cryocooled magnet. We have confirmed that the calculated critical current (I c ) of the top pancake coil of the model magnet was in good agreement with the measured coil I c from 30 to 77 K under the conduction-cooled conditions. In addition, we have evaluated the thermal runaway behavior of the model magnet under the conduction-cooled conditions. As a result, we have confirmed that the model magnet with a 0.3-mm-thick copper stabilizer had sufficient time to ramp down without degradation at 361 A transport current after the detected normal transition.

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Long RE123 coated conductors with high critical current over 500A/cm by IBAD/PLD technique

Cited by 34 publications

References 6 publications

Progress in R＆D of coated conductor in M-PACC project

Progress in R＆D of coated conductor in M-PACC project

High critical currents in heavily doped (Gd,Y)Ba2Cu3Ox superconductor tapes

Evaluation of a 426 kJ Cryocooled Magnet and a Model Magnet With REBCO Coated Conductors

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