Abstract
The Nb 3Sn growth rate, H c2, and J c of composite processed Nb 3Sn are substantially increased by the addition of hafnium to the niobium core. Furthermore, simultaneous addition of hafnium to the core and gallium to the matrix significantly increases H c2 and J c in high magnetic fields. SEM observations indicate that the addition of hafnium to the core enhances the growth rate of the Nb 3Sn layer without increasing the grain size of Nb 3Sn while the addition of gallium to the matrix causes an increase in coarseness of Nb 3Sn grains. The XMA analysis indicates the presence of small amounts of gallium and hafnium in the Nb 3Sn layer, J c of the Nb-Hf/Cu-Sn-Ga wire specimens exceeds 1 × 10 5 A cm −2 at 17 T, suggesting that multifilamentary Nb 3Sn composite wires capable of generating magnetic fields over 17 T may be feasible.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call