HIGH-STRENGTH AND HIGH-CONDUCTIVITY COMPOSITE WIRES FOR HIGH PULSED MAGNET

Magnets for high pulsed magnetic fields require a winding with high el ectrical conductivity, high strength, high heat capacity, and a soften ing temperature greater than 300 degrees C. Different conductors, deve loped on DRET contracts, are presented. The ultimate tensile stress at room temperature of macrocomposites, where the reinforcement is eithe r a jacket or fibres, checks the rule of mixtures, whereas sigma(uts) of Cu/Nb nanocomposites with continuous Nb nanofibres exhibit a very i nteresting deviation from the rule of mixtures leading to sigma(uts)(7 7 K) = 1206 MPa for 30% Nb.