Niobium-titanium superconductors produced by powder metallurgy having artificial flux pinning centers

摘要: Superconductors formed by powder metallurgy have a matrix of niobium-titanium alloy with discrete pinning centers distributed therein which are compatible metal. The artificial in the Nb-Ti reduced size processing steps to sizes on order coherence length, typically range 1 10 nm. To produce superconductor, powders body centered cubic and second phase flux material, such as Nb, mixed desired percentages. mixture is then isostatically pressed, sintered at selected temperature time cohesive structure having characteristics without undue chemical reaction, billet deformation, swaging, swaged sample receives heat treatment recrystallization additional if necessary, sheathed normal conducting sheath, material drawn into wire. resulting superconducting wire has provide enhanced J ct due effects.