Scale up of high-performance Y-Ba-Cu-O coated conductors

Selvamanickam, V.; Lee, H.-G.; Li, Y.; Reeves, J.; Qiao, Yunfei; Xie, Yiyuan; Lenseth, K.; Carota, G; Funk, M.; Zdun, Konrad; Xie, Jinqiao; Likes, K.; Jones, Martin O.; Hope, L.; Hazelton, D.W.

doi:10.1109/tasc.2003.811829

Cited by 29 publications

(15 citation statements)

References 6 publications

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“…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]. We have investigated a high rate deposition of YBCO layer by 6-stage CVD equipment [5], [7], in which the reactor chamber has six small reactors that are arranged in a line along the tape transferring direction, on a highly biaxially textured pulsed-laser-deposition capped ion-beam-assisted-deposition (IBAd)-Gd-Zr-oxide (GZO) buffer layer.…”

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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“…[26][27][28][29] So complex was this development that it has only been within the last four years that the fabrication of long lengths of high-J c conductors has been realized. [22,[30][31][32] In order for these wires to reach their full potential for many applications, an additional requirement was placed on these large-scale deposition processes entailing the controlled introduction of defect densities for improving or tailoring the flux pinning in applied magnetic fields. HTS materials are type II superconductors and in applied magnetic fields (H), lines of quantized magnetic flux (vortices) penetrate the superconductor above a lower critical field H c1 .…”

Section: Introductionmentioning

confidence: 99%

Progress in Nanoengineered Microstructures for Tunable High‐Current, High‐Temperature Superconducting Wires

et al. 2008

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High critical current densities (Jc) in thick films of the Y1Ba2Cu3O7–δ (YBCO, Tc ≈ 92 K) superconductor directly depend upon the types of nanoscale defects and their densities within the films. A major challenge for developing a viable wire technology is to introduce nanoscale defect structures into the YBCO grains of the thick film suitable for flux pinning and the tailoring of the superconducting properties to specific, application‐dependent, temperature and magnetic field conditions. Concurrently, the YBCO film needs to be integrated into a macroscopically defect‐free conductor in which the grain‐to‐grain connectivity maintains levels of inter‐grain Jc that are comparable to the intra‐grain Jc. That is, high critical current (Ic) YBCO coated conductors must contain engineered inhomogeneities on the nanoscale, while being homogeneous on the macroscale. An analysis is presented of the advances in high‐performance YBCO coated‐conductors using chemical solution deposition (CSD) based on metal trifluoroacetates and the subsequent processing to nano‐engineer the microstructure for tuneable superconducting wires. Multi‐scale structural, chemical, and electrical investigations of the CSD film processes, thick film development, key microstructural features, and wire properties are presented. Prospects for further development of much higher Ic wires for large‐scale, commercial application are discussed within the context of these recent advances.

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“…YBCO-based CCs are promising in applications such as transmission cables, motors, generators, magnetic energy storage system, etc. Research and development activities are focused on the achievement of high infield critical current densities, preparation of thick films carrying high engineering current densities, fabrication of high quality as well as long length tapes or wires and exploration of novel deposition methods with low costs and high efficiency [3][4][5]. YBCO film, as the superconducting layer, is especially significant to improve the performance of CCs.…”

Section: Introductionmentioning

confidence: 99%