Crystal site determination of dilute alloying elements in polycrystalline Nb3Sn superconductors using a transmission electron microscope

摘要

It is demonstrated that quantitative site occupancy of dilute constituents, 2 at. %, in polycrystalline materials of typical grain size 0.3 μm can be obtained by using the channeling effect in electron induced x‐ray emission. The important alloying elements Ti and Ta which improve the superconducting properties of Nb3Sn made by the bronze process were both found to occupy the Nb sites.