Abstract
The composition dependence of the superconducting transition temperature Tc has been measured for the solid-solution range of the system Ta–Ti. Tc values, determined resistively for heavily cold-worked wire specimens, varied smoothly with composition, exhibiting a maximum of 8.8°K corresponding to a valence-electron-to-atom ratio of 4.5. Little sharpening of transitions was found for annealed samples, and lower values of Tc were obtained. The change in Tc of a nominally equiatomic alloy with heat treatments in the range 300° to 1200°C is discussed in terms of the microstructural changes.
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