METHOD TO MANUFACTURE COMPOSITE SUPERCONDUCTING TAPE BASED ON NbSn COMPOUND Russian patent published in 2012 - IPC H01L39/24 B82B3/00 

FIELD: electricity.

SUBSTANCE: method to manufacture a superconducting tape on the basis of Nb₃Sn compound includes the following subsequent stages: - assembly of a multilayer pack from alternating Nb- and Cu-foils with thickness of 0.1-0.3 mm, which is first exposed to diffusion welding, then to rolling on a vacuum rolling mill, and further to rolling at room temperature until the tape thickness is 0.1-0.3 mm; - assembly of a multilayer pack from multilayer Nb/Cu-foils with thickness of 0.1-0.3 mm, produced after the first stage, exposed to the same treatment as at the first stage, until the tape thickness is 0.1-0.5 mm; - assembly of a multilayer pack from strips of tin bronze, containing (10-12) wt % Sn, with thickness of 0.3-0.5 mm and sections of Nb/Cu-tape produced at the previous stage, its arrangement in a shell from annealed copper foil with thickness of 0.1-0.3 mm, welding and rolling until the tape thickness is 0.2-0.3 mm, at certain ratio of thicknesses and quantities of niobium and bronze layers and annealing of the produced composite tape at 600-850°C for 1-350 hr.

EFFECT: increased critical density of tape current and improved stabilising properties.

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