FIELD: electricity.
SUBSTANCE: Nb3Sn-based superconducting wire includes multi-core including Nb3Sn composition and niobium and/or tantalum-based diffusion barrier layer on the core surface, and external shell out of copper or copper alloy, so that a nanocomposite Cu-Nb layer including 5 to 30% of Nb and mechanical strength of 1000 to 2000 MPa is placed between diffusion barrier layer and external shell, and ratio of nanocomposite layer and external copper shell layer areas in wire cross-section is 0.1 to 9.
EFFECT: superconductor with high mechanical strength for application in large magnetic systems with fields over 12 T.
2 cl, 1 dwg
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