METHOD OF MAKING MULTI-LAYER TAPE NANOSTRUCTURE COMPOSITE BASED ON SUPERCONDUCTING NIOBIUM-TITANIUM ALLOY

摘要

FIELD: physics; conductors.;SUBSTANCE: invention relates to making composites with improved current-carrying capacity and can be used, particularly, for making superconducting magnet windings. According to the invention, the method of making multi-layer tape nanostructure composites based on a niobium-titanium alloy for composite superconductors involves multi-cycle rolling, each cycle of which involves assembling a packet from alternating plates of niobium and a niobium-titanium alloy, attaching the plates to each other into a packet through diffusion welding at temperature 800-900°C and pressure 20-40 MPa for 0.5-3 hours, hot vacuum rolling and cold rolling. In the first cycle, the initial plates are components of the composite, and in the second and following cycles - plates, obtained from the previous cycle. To stabilise the superconductor before the last rolling cycle, the welded packet is put into a copper casing. Thickness of the copper casing is 3-25% of the thickness of the packet.;EFFECT: increased critical current density.;2 cl, 2 tbl, 6 ex