Al-Pb-Bi monotectic alloys with three different compositions were melted and solidified under microgravity environment in the Space Shuttle. The (Pb, Bi) particles were dispersed uniformly in the Al matrix, while evident sedimentation was observed in the reference sample processed under 1 gravity (G). The alloys were cold-worked into wires and superconducting properties of the wires were investigated. During cold-working, the (Pb, Bi) particles were elongated into fine fibers in the Al matrix and the distance between the (Pb, Bi) fibers became so small that the wires showed complete zero resistance below 9K due to proximity effect.
