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Some effects of matrix additions to internal tin processed multifilamentary Nb/sub 3/Sn superconductors

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2 Author(s)
Pyon, T. ; IGC Adv. Superconductors, Waterbury, CT, USA ; Gregory, E.

Internal tin processed Nb/sub 3/Sn multifilamentary wires were fabricated with matrices containing either Ti or Ge. Some effects of these matrix additions on the formation rate of Nb/sub 3/Sn and on the J/sub c/'s obtained, have been determined. The effect of a 0.7 wt.% Ge addition on material with Nb 1 wt.% Ta, Nb 7.5 wt.% Ta and pure Nb filaments has been examined as has that of three different levels of Ti in the Cu matrix with the filament compositions. The tubular-tin-source (TTS) process was chosen for this work, because this process was believed to be less sensitive to the hardness of the matrix than the tin-core process. In this study, three different reaction heat treatments were carried out to explore the variation of J/sub c/ of these materials. A discussion of the results and significant effects of the addition elements is given.<>

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Applied Superconductivity, IEEE Transactions on  (Volume:5 ,  Issue: 2 )