| 摘要 |
<p>A sheathing material is disclosed for superconducting wires deformed by stretching or a similar process during their manufacture, and of which the superconducting material is composed of an oxide the superconductivity of which deteriorates following their deformation, necessitating recovery by annealing at temperatures above 940° in order to restore and further improve the original superconductivity. The sheathing material generally used for such wires is silver. Recovery by annealing is generally carried out at about 900°C. Research has shown that the optional temperature range for recovery by annealing lies between 940° and 1030°C approximately. These temperatures are higher, however, than the melting temperature of silver in an oxygen-containing atmosphere. The purpose of the invention is to provide a sheathing material having the same advantageous properties as silver, but which melts only at a temperature above the optimal temperature for recovery by annealing. A silver alloy having a melting temperature higher than the melting temperature of pure silver is proposed as sheathing material.</p> |
