The RABiTS Approach: Using Rolling-Assisted Biaxially Textured Substrates for High-Performance YBCO Superconductors

Goyal, A.; Paranthaman, M.; Schoop, U.

doi:10.1557/mrs2004.161

Cited by 257 publications

(138 citation statements)

References 49 publications

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“…The other method is called the rolling-assisted biaxially textured substrate (RABiTS) method, where metal rolling textures are used. 11) In the following, I mainly describe the IBAD method. In the IBAD method, a GZO or MgO layer is deposited on a randomly grain-oriented metal substrate by sputtering, as described above.…”

Section: Y-based Superconducting Wiresmentioning

confidence: 99%

Development and Prospects for the Future of Superconducting Wires

Kumakura

2011

Jpn. J. Appl. Phys.

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Superconducting wires are important from the viewpoints of energy saving and the realization of a low-carbon society, because their applications in various types of electric power applications enable not only improved efficiency but also the reduction of size and weight owing to the fact that they can allow a large electric current density without resistance. Wires of Nb-Ti and Nb 3 Sn metallic superconductors have conventionally been used in various magnets. The research and development of high-temperature Cu-oxide superconducting wires has been intensively carried out focusing on Bi-and Y-based oxides; recently, the development of long wires of these oxides has also been in progress, and their applications to a variety of power systems are being eagerly discussed. MgB 2 , whose superconductivity was discovered in Japan in 2001, is also being studied with the aim of fabricating MgB 2 wires, and promising performance has been obtained. The research and development of superconducting wires using these materials is expected to achieve further progress and lead to their practical applications in the future.

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Section: Y-based Superconducting Wiresmentioning

confidence: 99%

Development and Prospects for the Future of Superconducting Wires

Kumakura

2011

Jpn. J. Appl. Phys.

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“…The use of adequate efficient and scalable methodologies to grow the YBa 2 Cu 3 O 7−x (YBCO)-HTS as epitaxial films on flexible metallic substrates following a multistack architecture, i.e., coated conductors (CC's) [14,15], spread completely out new paths for fast progress towards reaching the goals previously mentioned. After several years of intense research, the big challenge in R&D-CC has been to define affordable techniques for CC production, including preparation and conditioning of technical metallic substrates, either with textured (IBAD) [16] or thermomechanically textured (RABIT) [17,18] substrates, effectively protected by cap layers and the subsequent growth of the epitaxial YBCO films with high thickness at low cost/performance ratio.…”

Section: Introductionmentioning

confidence: 99%

Inkjet-Printed Chemical Solution Y2O3 Layers for Planarization of Technical Substrates

Vilardell¹,

Fornell

Sort

et al. 2017

Coatings

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Abstract:The implementation of the Chemical Solution Deposition (CSD) methodology with the Drop on Demand (DoD) inkjet printing (IJP) technology has been successfully employed to develop a Solution Deposition Planarization (SDP) method. We have used nanocrystalline yttrium oxide (Y 2 O 3 ) to decrease the roughness of technical metallic substrates by filling the surface imperfections and thus avoiding costly polishing steps. This alternative process represents an outstanding methodology to reduce the final cost of the second-generation coated conductors manufacturing. Two Y 2 O 3 metalorganic precursor ink formulations were successfully developed and tested to obtain surfaces as smooth as possible with adequate mechanical properties to hold the internal stress developed during the growth of the subsequent layers. By using these inks as precursors for IJP and after a proper tuning of the rheological and wetting parameters, we firstly obtained centimeter length uniform 100 nm-thick SDP-Y 2 O 3 films on unpolished stainless-steel substrate from Bruker HTS. The scalability of the roll to roll (R2R)-IJP process to 100 m is then demonstrated on metallic substrates as well. A complete characterization of the prepared SDP-Y 2 O 3 inkjet-printed layers was carried out using optical microscopy, FIB-SEM (Focus Ion Beam coupled to Scanning Electron Microscopy), XRD (X-ray Diffraction), AFM (Atomic Force Microscopy), reflectometry and nanoindentation techniques. Then, the morphology, thickness, crystallinity and mechanical properties were evaluated, together with the surface roughness in order to assess the resulting layer planarity. The impact of planarity was additionally studied via growth of biaxially textured buffer layers as well as further functional layers. 1.1 µm-thick YSZ layers with in-plane textures better than the stainless steel (SS) polished reference were successfully deposited on top of 100 nm SDP-Y 2 O 3 films yielding 50% of I c in contrast to the standard SS reference.

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“…To enable high critical current densities in a superconducting layer, the frequency of high angle boundaries (HABs) in the substrate should be small, which can be achieved via a so-called rolling assisted biaxially textured substrates (RABiTS) process [7,13], utilizing heavy rolling and high temperature annealing. In face centered cubic (fcc) materials, recrystallization after heavy rolling typically results in a strong {001}〈100〉 cube texture which further strengthens during grain growth.…”

Section: Introductionmentioning

confidence: 99%

Comparative characterization of Cu–Ni substrates for coated conductors

Tian

Suo

Wulff

et al. 2014

Journal of Alloys and Compounds

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Three Cu 100-x Ni x alloys, with x = 23, 33 and 45 at.%Ni, have been evaluated for use as substrates for coated conductors on the basis of measurements of their microstructure, crystallographic texture and hardness. It is found that high-temperature annealing after heavy rolling generates strong cube textures in each investigated alloy. For all of these alloys an increase in the annealing temperature from 800 °C to 1000 °C strengthens the cube texture and reduces the fraction of high angle grain boundaries. In the Cu−23 at.%Ni and Cu−33 at.%Ni alloys annealed at 1000 °C for 1 h, the fraction of the cube texture approaches 100% and the fraction of high angle boundaries is less than 4%.These two alloys are however very soft in the annealed condition. The cube texture in the Cu−45 at.%Ni substrate is slightly weaker than in the two other alloys, but this substrate 1 Corresponding author: Tel. +86 10 67392947, E-mail: honglisuo@bjut.edu.cn is considerably harder, which makes it better suited for large scale production of superconducting tapes.

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The RABiTS Approach: Using Rolling-Assisted Biaxially Textured Substrates for High-Performance YBCO Superconductors

Cited by 257 publications

References 49 publications

Development and Prospects for the Future of Superconducting Wires

Development and Prospects for the Future of Superconducting Wires

Inkjet-Printed Chemical Solution Y2O3 Layers for Planarization of Technical Substrates

Comparative characterization of Cu–Ni substrates for coated conductors

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