Application of textured highly alloyed Ni–W tapes for preparing coated conductor architectures

Hühne, Ruben; Eickemeyer, J.; Sarma, V. Subramanya; Güth, A.; Thersleff, Thomas; Freudenberger, J.; Haas, O. de; Weigand, M.; Durrell, John; Schultz, L.; Holzäpfel, B.

doi:10.1088/0953-2048/23/3/034015

Cited by 23 publications

(14 citation statements)

References 29 publications

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“…Note also that coated conductors fabricated by this technology are strongly magnetic because of the ferromagnetic substrate, but efforts to mitigate this problem by developing NiW alloys with depressed or even completely suppressed ferromagnetism (depending on the W content) are under way and look promising. 107 The second processing route follows a different path (Fig. 33).…”

Section: High Temperature Superconductorsmentioning

confidence: 99%

Radiation Effects on Superconducting Fusion Magnet Components

Weber

2011

Int. J. Mod. Phys. E

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Nuclear fusion devices based on the magnetic confinement principle heavily rely on the existence and performance of superconducting magnets and have always significantly contributed to advancing superconductor and magnet technology to their limits. In view of the presently ongoing construction of the tokamak device ITER and the stellerator device Wendelstein 7X and their record breaking parameters concerning size, complexity of design, stored energy, amperage, mechanical and magnetic forces, critical current densities and stability requirements, it is deemed timely to review another critical parameter that is practically unique to these devices, namely the radiation response of all magnet components to the lifetime fluence of fast neutrons and gamma rays produced by the fusion reactions of deuterium and tritium. I will review these radiation effects in turn for the currently employed standard "technical" low temperature superconductors NbTi and Nb 3 Sn, the stabilizing material (Cu) as well as the magnet insulation materials and conclude by discussing the potential of high temperature superconducting materials for future generations of fusion devices, such as DEMO.

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Section: High Temperature Superconductorsmentioning

confidence: 99%

Radiation Effects on Superconducting Fusion Magnet Components

Weber

2011

Int. J. Mod. Phys. E

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“…energy harvesters, would benefit from the use of a flexible substrate. Flexibility can be achieved by using organic substrates [4] Developments in the processing of high-temperature superconducting tapes have shown that cube-textured Ni-based alloys can be used as templates for growing preferentially oriented ceramic thin films [7]. The present work was undertaken as a proof-of-concept study to demonstrate that this approach can also be applied to the manufacture of textured KNN films directly on flexible, electrically conductive substrates.…”

Section: Introductionmentioning

confidence: 91%

Deposition of highly oriented (K,Na)NbO3 films on flexible metal substrates

et al. 2018

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“…Furthermore, alloying also plays a fundamental role in both the generation of the cube texture and the temperature region where this texture is stable [ 3 ]. Alloying with refractory metals, such as Mo, W, Nb and Ta, or with Cr, enabled achievement of thermally stable quality texture at high temperatures, up to and above 800 °C [ 4 , 5 , 6 , 7 ]. In addition, these Ni alloys feature an increase of mechanical strength and a weakening of the ferromagnetism of pure Ni.…”

Section: Introductionmentioning

confidence: 99%

Highly Regular Hexagonally-Arranged Nanostructures on Ni-W Alloy Tapes upon Irradiation with Ultrashort UV Laser Pulses

et al. 2022

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Nickel tungsten alloy tapes (Ni—5 at% W, 10 mm wide, 80 µm thick, biaxially textured) used in second-generation high temperature superconductor (2G-HTS) technology were laser-processed in air with ultraviolet ps-laser pulses (355 nm wavelength, 300 ps pulse duration, 250–800 kHz pulse repetition frequency). By employing optimized surface scan-processing strategies, various laser-generated periodic surface structures were generated on the tapes. Particularly, distinct surface microstructures and nanostructures were formed. These included sub-wavelength-sized highly-regular hexagonally-arranged nano-protrusions, wavelength-sized line-grating-like laser-induced periodic surface structures (LIPSS, ripples), and larger irregular pyramidal microstructures. The induced surface morphology was characterized in depth by electron-based techniques, including scanning electron microscopy (SEM), electron back scatter diffraction (EBSD), cross-sectional transmission electron microscopy (STEM/TEM) and energy dispersive X-ray spectrometry (EDS). The in-depth EBSD crystallographic analyses indicated a significant impact of the material initial grain orientation on the type of surface nanostructure and microstructure formed upon laser irradiation. Special emphasis was laid on high-resolution material analysis of the hexagonally-arranged nano-protrusions. Their formation mechanism is discussed on the basis of the interplay between electromagnetic scattering effects followed by hydrodynamic matter re-organization after the laser exposure. The temperature stability of the hexagonally-arranged nano-protrusion was explored in post-irradiation thermal annealing experiments, in order to qualify their suitability in 2G-HTS fabrication technology with initial steps deposition temperatures in the range of 773–873 K.

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Application of textured highly alloyed Ni–W tapes for preparing coated conductor architectures

Cited by 23 publications

References 29 publications

Radiation Effects on Superconducting Fusion Magnet Components

Radiation Effects on Superconducting Fusion Magnet Components

Deposition of highly oriented (K,Na)NbO3 films on flexible metal substrates

Highly Regular Hexagonally-Arranged Nanostructures on Ni-W Alloy Tapes upon Irradiation with Ultrashort UV Laser Pulses

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