Hybrid filament or ribbon superconductor, method of making it and multifilament wires obtained by joining these hybrid filaments together.

摘要

The superconducting ribbon or strand consists of at least two layers surrounding a core. The ribbon or strand consists of two superconducting materials, one of which is a Chevrel phase possibly doped and forming one of the layers or the core, while the second superconductor is not a Chevrel phase and forms either another layer, possibly with voids, or the core. The invention also relates to the preparation of the ribbon or strand and to a filamentary strand formed by combining such hybrid strands.