Long length PIT conductors realized by rectangular deformation route

Herrmann, P.F.; Böck, J.; Bruzek, Christian-Éric; Cottevieille, C.; Duperray, G.; Hascicek, J.; Legat, D.; Leriche, Anne; Verhaege, T.; Parasie, Y.

doi:10.1088/0953-2048/13/5/309

Cited by 12 publications

(4 citation statements)

References 8 publications

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“…Critical current densities as high as have been found in Ag/Bi2212 tapes at 4.2 K and 10 T [3]. It has been demonstrated that degrades around 20% when the applied magnetic field increases from 10 T to 30 T [4].…”

Section: Introductionmentioning

confidence: 76%

Phase Formation and Evolution, Texturing and Current Transport in Ag/Bi2212 PIT Monofilamentary Tapes

Rodrigues

Bigansolli

Cursino

et al. 2005

IEEE Trans. Appl. Supercond.

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Superconducting tapes of ceramic material capable of transporting high current densities at high operation temperatures have been revealed as promising conductors in applied superconductivity. Tapes of Ag/Bi2212 present excellent characteristics and their processing techniques are being improved. This work presents a study on the formation of phases and the texturing behavior of Ag/Bi2212 monofilamentary tapes after several heat treatments with different cooling rates from 890 C to 830 C and silver doping, allowing an optimization of the heat treatment profiles aiming the obtainment of close to stoichiometric superconducting phases with high texturing. The tapes were fabricated using Bi2212 precursor powder and the powder-in-tube (PIT) method. The powder was pressed inside the Ag tube, and the set was mechanically deformed by swaging and rolling to the final thickness of 150 m. After heat treatment, the samples were characterized by X-ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) equipped with Energy Dispersive Spectrometer (EDS). The results show the effect of each heat treatment profile on the microstructure and superconducting characteristics of the Ag/Bi2212 tapes, as well as they show the ways to obtain the best texturing of the samples aiming high current transport.

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Section: Introductionmentioning

confidence: 76%

Phase Formation and Evolution, Texturing and Current Transport in Ag/Bi2212 PIT Monofilamentary Tapes

Rodrigues

Bigansolli

Cursino

et al. 2005

IEEE Trans. Appl. Supercond.

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“…Bi2212 multifilament tapes were fabricated by the well established powder in tube (PIT) technique. Details of the process can be found elsewhere [7].…”

Section: Methodsmentioning

confidence: 99%

Misalignment angles and the 2D–3D temperature crossover in Bi2212 multifilaments studied using transport critical current densities

Bourgault¹,

Flahaut²,

Antonevici³

et al. 2004

Supercond. Sci. Technol.

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Misalignment angles in multifilamentary Bi2212 tapes have been obtained by measuring transport critical current densities. The study shows that two misalignment angles exist in such materials. The samples studied give a transversal misalignment angle Θ*, perpendicular to the filaments, of close to 8° and a longitudinal one α*, parallel to the filaments, of about 5.5°. The 2D–3D temperature crossover T* of the vortices network has also been estimated using the angular dependence of transport Jc in a magnetic field at different temperatures.

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“…The tape comprises 78 filaments embedded in a Ag-Mg (0.2% Mg) sheath. Details of this process can be found elsewhere [12].…”

Section: Dynamic Heat Process Under a Magnetic Fieldmentioning

confidence: 99%

Misalignment angles’ reduction in Bi2212 multifilaments melted by dynamic heat treatment under a magnetic field

Villaume

Bourgault

Porcar

et al. 2007

Supercond. Sci. Technol.

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The superconducting properties of Bi2212 multifilament tapes are directly linked to the misalignment angles. We recently developed a dynamic heat treatment under a magnetic field of 5 T to improve the texture quality of superconducting Bi2212 multifilaments. As melting in a high magnetic field reduces the misalignment angles due to magnetic anisotropy effects, good transport Jc performances have been achieved for Bi2212 tapes prepared by heat treatment under a magnetic field. The misalignment angles of the tapes are characterized by transport Jc measurements and x-ray diffraction study. The trapping properties were investigated by a magneto-optical (MO) experiment.

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Long length PIT conductors realized by rectangular deformation route

Cited by 12 publications

References 8 publications

Phase Formation and Evolution, Texturing and Current Transport in Ag/Bi2212 PIT Monofilamentary Tapes

Phase Formation and Evolution, Texturing and Current Transport in Ag/Bi2212 PIT Monofilamentary Tapes

Misalignment angles and the 2D–3D temperature crossover in Bi2212 multifilaments studied using transport critical current densities

Misalignment angles’ reduction in Bi2212 multifilaments melted by dynamic heat treatment under a magnetic field

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