Metallurgy and superconductivity in bronze-processed NB3SN doped cerium and cerium-titanium

Metallurgy and superconductivity in Ce-doped and Ce-Ti -doped Nb₃Sn samples were investigated. The wires containing Ce-bronze and Ce-Ti-bronze were not noticeably difficult to draw. The addition of Ce to the bronze not only enhances the growth rate of the Nb₃Sn 1ayer but also improves the composition distribution within the wire. The critical temperature Tc of Ce-doped samples treated at 700○e are obviously higher than pure Nb₃Sn. The Jc difference between samples with small amount. of Ce and pure Nb3Sn is not obvious. Jc decreases slightly in low-field with increasing Ce content.