Method of decoupling an HTc superconductive multi-filament strand having a silver-based matrix, and a multifilament strand made thereby

摘要

The invention relates a powder in tube type method of making an HTc superconductive multifilament strand having a silver-based matrix, in which: ;a first envelope is filled with powder reagents for an HTc superconductor; ;the resulting billet is drawn down into a monofilament strand; ;said monofilament strand is cut up into lengths and a secondary envelope is filled with the resulting lengths, thereby making a multifilament billet which is drawn down into a multifilament strand; ;said multifilament strand is cut up into lengths and a new envelope is filled with the resulting lengths, thereby making a new multifilament billet which is drawn down into a new multifilament strand; and ;it is shaped and subjected to heat treatment; ;according to the invention, at least one face of the monofilament strand is electrically insulated; and ;during the first multifilament step the secondary envelope is filled with the resulting insulated lengths.