A subcomponent of Nb3Sn superconducting wire and a method for preparing the superconducting wire

Abstract

This invention belongs to the field of superconducting wire technology, and relates to a sub-component of Nb3Sn superconducting wire and a method for preparing the superconducting wire. The sub-component structure of the Nb3Sn superconducting wire, from the outside to the inside, consists of an outer Cu region, an Nb cylindrical region, a Cu / Nb single-core rod region, an inner Cu region, and a central Sn alloy rod region; the cross-sectional area ratio of the Cu region, Nb cylindrical region, Cu / Nb single-core rod region, inner Cu region, and central Sn alloy rod region is 3–12:0–12:47–65:7–15:24–30. The structure of the Nb3Sn superconducting wire is achieved by densely arranging the sub-components into hexagonal, semi-circular, and fan-shaped sub-components, with an outer ring sequentially coated with a Ta layer and a composite Cu cylindrical region. This invention solves the technical problem of how to prepare Nb3Sn superconducting wires with low Cu, high Sn, and high Nb and high critical current carrying capacity without sacrificing the wire's thermal stability.

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