Preparation method of quasi-isotropic superconducting tape, superconducting tape and superconducting cable

Abstract

The invention provides a method for preparing a quasi-isotropic superconducting tape, a superconducting tape and a superconducting cable, comprising: a plating step: plating a superconducting layer on the transition layer, and an etching step: A silver layer is plated on the superconducting layer, and the silver layer and the superconducting layer are etched; or, the superconducting layer is etched, and a silver layer is plated on the etched superconducting layer; Obtaining an etching pattern extending along the length direction of the superconducting strip by etching, the etching pattern has components along the width and depth directions; winding step: winding the superconducting strip along the width direction. The quasi-isotropic superconducting tape prepared by the invention is the smallest cable unit, which is very convenient to use and can be easily twisted into a larger composite cable.

Description

technical field [0001] The invention relates to the field of superconducting technology, in particular to a method for preparing a quasi-isotropic superconducting tape, a superconducting tape and a superconducting cable. Background technique [0002] The second-generation superconducting tape made of ReBCO (Re is a rare earth element) is also called a coated conductor because it has stronger current-carrying capacity, higher magnetic field performance and higher With low material cost, it has wider and better application prospects in many fields such as medical treatment, military affairs, and energy. The second-generation superconducting strip is generally produced on a nickel-based alloy substrate by a multi-layer coating process because ReBCO, which is the core of the superconducting current-carrying core, is hard and brittle, so it is also called a coated conductor. The second-generation superconducting tape generally consists of a base tape, a buffer layer (transition ...

AI Technical Summary

Problems solved by technology

[0006] In large magnets, the flattened structure of the strip induces superconducting shielding currents, causing not only the well-known severe field distortion problem, but also potentially fatal local strains

In high-field magnets, the main problems of the shielding current coupling field due to the huge aspect ratio of the strip are: 1. The main magnetic field is disturbed. Compared with the original target field, the shielding current coupling field reduces the magnetic flux and the uniformity fluctuation ( Field error) 2. Main field drift, that is, as the shielding current coupling field magnetization decays, the flux density of the main hole increases with time

3. The local band Lorentz force is not uniform, that is, the shielding current coupling field produces spatially uneven radial stress, resulting in uneven local band strain of a single strip

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