Deposition of superconducting niobium coatings on titanium from molten salts

Shevyrev, A. A.; Колосов, В. Н.

doi:10.1134/s0020168510121040

Cited by 5 publications

(3 citation statements)

References 3 publications

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“…X ray diffraction analysis (XRD), the measure ment of the critical point of transition into supercon ductivity, as well as the study of the structure and roughness of the substrate and coating surfaces and the determination of the dislocation density and of the residual stresses of the first kind (macrostresses), and second kind (microstressess) were implemented in accordance with techniques described in [12,20,27]. The macrostresses were also evaluated based on the difference between thermal expansion coefficients (TECs) of the substrate and coating materials [28].…”

Section: Methodsmentioning

confidence: 99%

“…The choice of these metals is due to their practical significance. They are applied for protecting metals against corrosion in molten salts [12,20] and in superconductor/ferromagnetic hybrid systems [21][22][23], as well as in other devices [5]. Furthermore, Cu-Nb composites are promising functional and structural materials with good strength characteristics that combine superconduc tivity and high conductivity [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

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Structure, texture, and properties of superconductive electrolytic niobium coatings on nickel and copper substrates

Колосов

Shevyrev²

2015

Phys. Metals Metallogr.

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Structure, texture, chemical purity, and other characteristics of superconductive niobium coatings prepared via electrochemical deposition onto nickel and copper substrates in (LiF + NaF + KF) eut + 5 wt % K 2 NbF 7 molten salt are studied. It is shown that, when depositing the coatings onto nickel, the intermediate layer of Ni 3 Nb and NiNb intermetallides is formed at the substrate-coating interface, which inhibits the diffu sion of nickel in niobium. The nickel concentration in niobium coatings above this layer is (2-7) × 10 -2 wt %. In coatings deposited onto the copper substrate the copper content does not exceed 1.5 × 10 -4 wt %, and from the viewpoint of the amount of impurities, niobium is considered as a high purity metal. The dynamics of structure modifications in niobium coatings and changes in microdeformations and dislocation density in the deposited metal are explored depending on the current density at the cathode.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Structure, texture, and properties of superconductive electrolytic niobium coatings on nickel and copper substrates

Колосов

Shevyrev²

2015

Phys. Metals Metallogr.

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“…Niobium in the form of thin films and coatings is used in high-tech cryogenic devices using the phenomenon of superconductivity (1)(2). For their preparation, the niobium ability can be used to form electrolytic structurally dense cathodic films in molten salts (3). Electrolytic method does not require complex equipment and allows forming uniform coatings with the desired thickness on the inner and outer surfaces of articles with complex configuration.…”

Section: Introductionmentioning

confidence: 99%

The Choice of Substrate Material and Electrodeposition of High Purity Niobium Coatings

et al. 2016

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The interaction of different materials with the niobium containing melt was investigated. As substrate materials the ceramics, beryllium and carbopyroceram were chosen. Several spherical ceramic and beryllium samples were coated with protective molybdenum film by magnetron sputtering. After the experiment (exposition time 10 min) the exfoliation of molybdenum film from ceramic samples was observed due to interaction of the substrate with the melt. The beryllium samples regardless of the shape and the presence of the protective films were dissolved in the niobium containing melt due to more negative electrode potential comparing with niobium one. The carbopyroceram samples were exposed in the melt during 3 and 12 hours. It was found that the carbopyroceram it not corrodes in the niobium containing melt. The optimal regimes for electrodeposition of smooth uniform niobium coatings with the thickness up to 50 µm on carbopyroceram spheres were found.

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Deposition of superconducting Nb3Sn and high-purity Nb coatings on the rotor of a cryogenic gyroscope

Колосов

Shevyrev²

2012

Inorg Mater

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Deposition of superconducting niobium coatings on titanium from molten salts

Cited by 5 publications

References 3 publications

Structure, texture, and properties of superconductive electrolytic niobium coatings on nickel and copper substrates

Structure, texture, and properties of superconductive electrolytic niobium coatings on nickel and copper substrates

The Choice of Substrate Material and Electrodeposition of High Purity Niobium Coatings

Deposition of superconducting Nb3Sn and high-purity Nb coatings on the rotor of a cryogenic gyroscope

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