Significant improvement of the critical current of MOD-derived YBa2Cu3O7-δ
 -coated conductors by post-annealing treatment

Chen, Jing; Huang, Renkun; Shen, Jiaji; Qian, Sida; Li, Minjuan; Feng, Feng; Bai, Chuanyi; Liu, Zhiyong; Cai, Chuanbing

doi:10.35848/1882-0786/abf4f0

Cited by 9 publications

(4 citation statements)

References 25 publications

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“…As we will see, these are among the champion films in terms of vortex pinning efficiency thus confirming the key role of these defects. It is also worth to mentioning that the concentration of these SFs in YBCO CCs can be enhanced by performing post-annealing treatments under O 2 atmosphere or oxygenating under different conditions [236,237], thus corroborating that the stoichiometry paradox mentioned before is solved through the formation of Cu vacancies, and confirming the positive role of these defects to enhance the critical currents if there are short enough to strongly increase the concentration of the partial dislocations surrounding them.…”

Section: Nanoscale Defects Generation: Structure and Propertiessupporting

confidence: 68%

Progress in superconducting REBa₂Cu₃O₇ (RE = rare earth) coated conductors derived from fluorinated solutions

Obradors,

Puig,

Ricart

et al. 2024

Supercond. Sci. Technol.

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In this work, we review recent progress achieved in the use of Chemical Solution Deposition (CSD) based on fluorinated metalorganic precursors to grow superconducting REBCO films and CCs. We examine, first of all, the advances in optimizing the steps related to the solutions preparation, deposition and pyrolysis based on novel low-fluorine metalorganic solutions. We show that a new type of multifunctional colloidal solutions including preformed nanoparticles, can be used to introduce artificial pinning centers (APCs). We analyze how to disentangle the complex physico-chemical transformations occurring during the pyrolysis with the purpose of maximizing the film thicknesses. Understanding the nucleation and growth mechanisms is shown to be critical to achieve a fine tuning of the final microstructure, either using the spontaneous segregation or the colloidal solution approaches, and make industrially scalable this process. Advanced nanostructural studies have deeply modified our understanding of the defect structure and its genealogy. It is remarkable the key role played by the high concentration of randomly distributed and oriented BaMO3 (M=Zr, Hf) nanoparticles which enhance the concentration of APCs, such as stacking faults and the associated partial dislocations.Correlating the defect structure with the critical current density Jc(H,T,) allows to reach a tight control of the vortex pinning properties and to devise a general scheme of the vortex pinning landscape in the whole H – T phase diagram. We also refer to the outstanding recent achievements in enhancing the vortex pinning strength by shifting the carrier concentration in REBCO films towards the overdoped state, where the pinning energy is maximum and so, record values of critical current densities are achieved. This confirms the performance competitiveness of nanocomposite CCs prepared through the CSD route. We conclude with a short summary of the progress in scaling the CC manufacturing using fluorinated solutions.

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Section: Nanoscale Defects Generation: Structure and Propertiessupporting

confidence: 68%

Progress in superconducting REBa₂Cu₃O₇ (RE = rare earth) coated conductors derived from fluorinated solutions

Obradors,

Puig,

Ricart

et al. 2024

Supercond. Sci. Technol.

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“…The BZO nanoparticles exhibit a monodisperse state, which is confirmed by the EDS mapping result of the Zr element. Besides, some stacking faults are clearly observed in our MOD-derived (Y,Dy)BCO films, which is a common phenomenon in MOD REBCO films [17,31]. There is an interesting phenomenon that the presynthesized BZO nanocrystals are also dispersed in the second phases of Y 2 O 3 , BaCuO x and CuO in YBCO film, as shown in figure 4(f).…”

Section: Microstructure Analysis Of Bzo-added (Ydy)bco Filmsmentioning

confidence: 74%

Monodisperse BaZrO₃ nanocrystals and flux pinning effect on upscaling MOD-derived (Y,Dy)Ba₂Cu₃O₇₋ _δ superconducting tapes

Huang,

Chen,

Liu

et al. 2023

Supercond. Sci. Technol.

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In the present work, the monodisperse BaZrO3(BZO) nanocrystals with controllable sizes were successfully introduced into trifluoroacetate metal-organic deposition derived (Y,Dy)Ba2Cu3O7-δ (TFA-MOD (Y,Dy)BCO) coated conductors superconducting tapes to act as effective pinning centers. The BZO nanocrystal addition strategy was extended to upscaling coated conductors as long as hundreds of meters, and as thick as 3.4 μm of (Y,Dy)BCO layers. The corresponding superconducting performances of BZO-added (Y,Dy)BCO coated conductors were systematically investigated under various applied magnetic fields and temperatures. It is revealed that the Ic(77K, self-field) of BZO-added tapes decreases linearly with the BZO concentrations, while the corresponding in-field lift-factors increase for all studied BZO additions. In-field Jc values under various fields at low temperatures show that the (Y,Dy)BCO tape with 5%-BZO addition exhibits better performance than that of other concentrations. Besides, such a benefit of BZO addition appears identical for both thin and thick samples as well as the hundreds of meters long tapes. The angular dependence of in-field Ic also shows that significant improvement occurs in all the studied angular ranges after nanocrystal BZO additions, demonstrating the nanocrystal addition strategy is of great value to upscaling commercial (Y,Dy)BCO tape for in-field applications. 

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“…In the previous study of trifluoroacetate metal organic decomposition (TFA-MOD), no similar phenomenon was discovered, 24) indicating that YBCO films can be deposited on LMO buffer layers without any interfacial reactions. Furthermore, the growth of YBCO does not occur in the atmosphere of a very low pO 2 atmosphere, 12,21) as the transient liquid phase is absent.…”

Section: Resultsmentioning

confidence: 98%

Rapid phase formation and interfacial reaction of YBa₂Cu₃O_7−δ coated conducts by using high-rate crystallization of fluorine-free chemical solution

Chu

Yang

et al. 2022

Jpn. J. Appl. Phys.

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In the present work, the high-rate epitaxial growth for superconducting YBa2Cu3O7-δ (YBCO) films on the substrates of LaMnO3(LMO)/IBAD-MgO/Y2O3/Al2O3/Hastelloy is achieved by fluorine-free metal organic deposition (FF-MOD) by rapidly switching the partial oxygen pressure (pO2) at a fixed temperature. Further investigation into the effects of temperature and switching pO2 on the phase transition of YBCO elucidates that the growth mode and microstructural characteristics of the studies films. BaMnO3 heterogeneous particles is observed in localized regions in the films by cross-sectional transmission electron microscopy (TEM), which may be generated by the interfacial reactions between the substrate and transient liquid phases. The present work implies the feasibility of FF-MOD for rapid growth of YBCO films on LMO buffered metallic substrates, regardless of interfacial reactions during the preparation.

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Significant improvement of the critical current of MOD-derived YBa₂Cu₃O_7-δ-coated conductors by post-annealing treatment

Cited by 9 publications

References 25 publications

Progress in superconducting REBa₂Cu₃O₇ (RE = rare earth) coated conductors derived from fluorinated solutions

Progress in superconducting REBa₂Cu₃O₇ (RE = rare earth) coated conductors derived from fluorinated solutions

Monodisperse BaZrO₃ nanocrystals and flux pinning effect on upscaling MOD-derived (Y,Dy)Ba₂Cu₃O₇₋ _δ superconducting tapes

Rapid phase formation and interfacial reaction of YBa₂Cu₃O_7−δ coated conducts by using high-rate crystallization of fluorine-free chemical solution

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Significant improvement of the critical current of MOD-derived YBa2Cu3O7-δ -coated conductors by post-annealing treatment

Cited by 9 publications

References 25 publications

Progress in superconducting REBa2Cu3O7 (RE = rare earth) coated conductors derived from fluorinated solutions

Progress in superconducting REBa2Cu3O7 (RE = rare earth) coated conductors derived from fluorinated solutions

Monodisperse BaZrO3 nanocrystals and flux pinning effect on upscaling MOD-derived (Y,Dy)Ba2Cu3O7− δ superconducting tapes

Rapid phase formation and interfacial reaction of YBa2Cu3O7−δ coated conducts by using high-rate crystallization of fluorine-free chemical solution

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Product

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About

Significant improvement of the critical current of MOD-derived YBa₂Cu₃O_7-δ-coated conductors by post-annealing treatment

Progress in superconducting REBa₂Cu₃O₇ (RE = rare earth) coated conductors derived from fluorinated solutions

Progress in superconducting REBa₂Cu₃O₇ (RE = rare earth) coated conductors derived from fluorinated solutions

Monodisperse BaZrO₃ nanocrystals and flux pinning effect on upscaling MOD-derived (Y,Dy)Ba₂Cu₃O₇₋ _δ superconducting tapes

Rapid phase formation and interfacial reaction of YBa₂Cu₃O_7−δ coated conducts by using high-rate crystallization of fluorine-free chemical solution