Scale Up of Applications-Ready Practical Y-Ba-Cu-O Coated Conductors

Selvamanickam, V.; Knoll, A.; Xie, Yiyuan; Li, Y.; Chen, Y.; Reeves, J.; Xiong, X.; Qiao, Ying; Salagaj, T.; Lenseth, K.; Hazelton, D.W.; Reis, C.T.; Yumura, H.; Weber, C.

doi:10.1109/tasc.2005.847664

Cited by 38 publications

(22 citation statements)

References 3 publications

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“…Reproducible, efficient and rapid manufacturing process is still required for practical electric power as well as for high field magnet applications. Manuscript Among the various methods to fabricate long coated conductors, metal organic chemical-vapor-deposition (MOCVD) is promising to achieve high critical current and speed-up the process [1]- [6]. It's because MOCVD has an advantageous capability to enlarge deposition area with high deposition rate [1], [4].…”

Section: Rapid Formation Of 200 M-long Ybco Coatedmentioning

confidence: 99%

Rapid Formation of 200 m-long YBCO Coated Conductor by Multi-Stage CVD

Watanabe

Kashima

Suda

et al. 2007

IEEE Trans. Appl. Supercond.

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Toward the industrialization of YBa 2 Cu 3 O 7 x (YBCO) coated conductors for practical applications, metal-organic chemical vapor deposition (MOCVD) has been investigated. We applied multi-stage MOCVD to achieve high-speed production of coated conductor because the increase of the number of depositing stages placed in a line could enlarge deposition area. Using 12-stage CVD, we succeeded in deposition of highly biaxially oriented YBCO layer at tape transfer speed of 50 m/h on the CeO 2 capped ion-beam-assisted-deposition (IBAD) Gd 2 Zr 2 O 7 (GZO) buffered Hastelloy tape, and achieved high critical current density ( c ) exceeding 2 MA cm 2 in a short sample. And it was found that lowering substrate temperature according to YBCO layer growth was effective to increase c . Using this method, high critical current ( c ) of 174 A was achieved by 1 m thick YBCO layer which passed through 12-stage CVD, and 227 A by 1 m thick YBCO layer deposited by 6-stage one. Based on these results, three 200 m-class YBCO layers were deposited by multiple depositions at tape speed of 50 m/h each, using the 12-stage CVD system. A 203 m-long YBCO layer was successfully deposited with end-to-end c of 92.8 A, so that the multiplication of c and length reached 18.8 kA m. These results indicate that a multi-stage CVD technique is useful for a rapid fabrication of long YBCO coated conductor.

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Section: Rapid Formation Of 200 M-long Ybco Coatedmentioning

confidence: 99%

Rapid Formation of 200 m-long YBCO Coated Conductor by Multi-Stage CVD

Watanabe

Kashima

Suda

et al. 2007

IEEE Trans. Appl. Supercond.

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“…The superconducting property is given by the power law characteristic. The equivalent conductivity of the superconductor is derived as (2) where is the critical current density and . The AC loss was calculated from the temporal evolution of electromagnetic field distribution.…”

Section: A Electromagnetic Field Analysis In Cross Section Of Conducmentioning

confidence: 99%

“…T HIS possibility of HTS cables using YBCO coated conductors (Y-CCs) is discussed recently, because the fabrication technologies for long Y-CCs with large critical currents have been developed [1], [2]. Since a Y-CC is very thin, the AC loss generated in it will be very small if the magnetic field is completely parallel to its wide face.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic Field Analysis of YBCO Coated Conductors in Multi-Layer HTS Cables

Sato

Amemiya

2006

IEEE Trans. Appl. Supercond.

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Electromagnetic field analyses of YBCO coated conductors in mono-layer and multi-layer high T c superconducting (HTS) cables with practical configurations were carried out to calculate their AC losses. Numerical models employing one-dimensional FEM and two-dimensional FEM were used in the analyses. The error of the 1D-model was assessed by comparing the loss calculated by the 1D-model and that calculated by the 2D-model. The gap between the conductors in each layer, the relative position of conductors in the inner layer and in the outer layer, and the number of layers were varied to study their influence on the AC loss. The numerically calculated AC losses were compared with the analytical values.

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“…Electroplating (Selvamanickam et al 2005) and bonding (Schoop et al 2005) are commonly used techniques for copper stabilizer application. Electroplating provides the benefi ts of rounded corners, which are desirable for high-voltage applications, absence of low melting point solders -thereby extending the usable temperature to 250 °C instead of 150 °C, and the ability to create a completely striated stabilizer for low AC loss multifi lamentary architectures.…”

Section: 3mentioning

confidence: 99%