Investigations of Bronze Processed Nb 3 Sn Wires With Enhanced Characteristics

The bronze processed Nb3Sn strands differed by specific layouts and the matrix and filament composition were investigated. Two ways of alloying were used: artificial alloyed filaments by Ti and use of alloyed bronze. By means of optical and electron microscopy the features of wire microstructure were explored. The dependences of critical current density from magnetic field and temperature have been determined. It is established that in explored alloyed wires the critical current density (Jc) is higher than 800 A/mm 2 (non-copper, diameter