Abstract
We are developing Nb/sub 3/Sn fiber-reinforced superconductors (FRS) for high field pulsed magnets. Multifilamentary FRS are fabricated by sputtering niobium and bronze around 22 tungsten fibers of 20-/spl mu/m diameter. The conductors are then heat-treated in an electric furnace and are solder-filled after plating copper chemically. Critical current densities of FRS have been measured up to 14.5 T. We have investigated the effect of heat-treatment conditions, tin concentration of bronze and titanium addition into niobium. Tensile stress-strain measurement showed that FRS has excellent stress toughness. >
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