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Kolosov V.N.,RAS Institute of Chemistry | Shevyrev A.A.,Sintez Research and Production Center
Inorganic Materials | Year: 2010

We report the critical current of superconducting Nb 3Sn coatings produced by electrocodeposition from molten salts and its anisotropy in transverse magnetic fields. The anisotropy is quantified by the ratio of the critical currents measured in magnetic fields parallel and normal to the coating surface, k. The effect of doping with tantalum and nitrogen on the microstructure, critical current, and anisotropy factor k of Nb3Sn coatings is examined. The k of the undoped and tantalum-doped coatings ranges from 0.4 to 1.0, and that of the nitrogen-doped coatings, from 0.4 to 1.4. The critical current anisotropy is interpreted in terms of the microstructure of the coatings. © 2010 Pleiades Publishing, Ltd. Source


Kolosov V.N.,RAS Institute of Chemistry | Shevyrev A.A.,Sintez Research and Production Center
Inorganic Materials | Year: 2012

Using Nb 3Sn layers deposited onto the outer and inner surfaces of copper tubes 30 and 50 mm in diameter, we have fabricated sections of a rigid superconducting coaxial cable up to 1 m in length. The highest current-carrying capacity of the cable at 4.2 K was 800-850 A/mm, which corresponded to a critical current density of (5.0-5.5) × 10 10 A/m 2 in the Nb 3Sn layer. © Pleiades Publishing, Ltd., 2012. Source


Kolosov V.N.,RAS Institute of Chemistry | Shevyrev A.A.,Sintez Research and Production Center
Inorganic Materials | Year: 2011

A procedure is proposed for the fabrication of superconducting helicoids which includes consecutive electrodeposition of Nb and Nb 3Sn layers from molten salts onto the surface of a plane-turn copper tape helix. © Pleiades Publishing, Ltd., 2011. Source


Shevyrev A.A.,Sintez Research and Production Center | Kolosov V.N.,RAS Institute of Chemistry
Inorganic Materials | Year: 2011

Superconducting niobium coatings have been electrodeposited from molten salts onto titanium substrates with a copper, nickel, or molybdenum protective layer, and their structure and magnetic properties have been studied. The coatings are shown to be suitable as a starting material for the superconducting layer of the rotor of cryogenic gyroscopes. © 2011 Pleiades Publishing, Ltd. Source


Kolosov V.N.,RAS Institute of Chemistry | Shevyrev A.A.,Sintez Research and Production Center
Inorganic Materials | Year: 2010

We demonstrate that Nb 3Sn coatings suitable for use in superconducting microwave devices can be produced by electrocodeposition of Nb and Sn. Superconducting cavities have been fabricated by electrodeposition in a galvanostatic mode using such coatings, and their performance has been evaluated. © 2010 Pleiades Publishing, Ltd. Source

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