D2-2

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Fabrication of Ge Added Nb₃Sn Wire by Internal Tin Method
KERI, *Andong National University
@S.S.Oh, D.W.Ha, S.C.Kim, H.S.Ha, K.S.Ryu, J.H.Ahn*

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　In order to investigate effect of Ge addition to the Cu matrix on the microstructure and the critical current density, three kinds of the internal tin processed Nb3Sn strands with pure Cu, Cu-0.4wt%Ge and Cu-0.8wt%Ge alloys were prepared. Nb3Sn formation was observed to be suppressed by Ge addition. Jc in high magnetic fields, n value and the Bc2 was confirmed to be improved by the Ge addition compared to the none additive one.