Very high current density niobium Titanium composites

The effects of increasing the heat treatment temperature in Nb 46.5 wt% Ti have been studied. The study has been confined to processes involving two or three heat treatments, since these are most compatible with an industrial scale process. Very high Jcvalues have been obtained using process variables significantly different from those normally used. In particular, we find that increasing the heat treatment temperature and the final drawing strain are very helpful in raising Jc. The maximum Jcvalues (at a sensitivity of 10^-14Ωm) of 3680 A/mm²(5 T, 4.2 K) and 1560 A/mm²(8 T, 4.2 K) were obtained for heat treatments at 420°C and for final drawing strains exceeding 5.