Further investigations of the solid-liquid reaction and high field critical current density in liquid-infiltrated Nb-Sn conductors.

Superior superconducting properties, such as high J(e)'s and T(e)'s have been obtained from reacted liquid-infiltrated Nb-Sn composite wires. These excellent properties are attributed to the chemistry and structure of the material which is prepared by a unique solid (Nb) - liquid (Sn) reaction. From heat capacity measurements, sharp bulk superconducting transitions of the A15 phase occur at 17.2-18K and the weight fraction of A15 in the composite wire is ~23%.