Proof-of-principle experiments for react-wind-sinter manufacturing of Bi2Sr2CaCu2Ox magnets

The manufacturing of long lengths of Bi2Sr2CaCu2Ox ( Bi2212) wire has led to the development of high-field magnets at low temperature. Both react-and-wind and wind-and-react manufacturing of magnets, however, have significant drawbacks that limit the performance of the conductor in magnet form. In this letter, an alternative approach to magnet manufacturing, react-wind-sinter, is proposed to avoid these drawbacks by splitting the heat treatment into two separate stages, with the temperature/time-sensitive peritectic melting occurring before magnet winding and the remaining solid-state sintering after magnet winding. Results from proof-of-principle experiments show that the split heat treatment does not adversely affect the conductor performance and that the subsequent heat treatment is capable of preventing bending-induced degradation of the conductor if the heat treatment is interrupted just after re-solidification from the peritectic melt.