Title :
Production of superconducting Nb3Sn wire using Nb or Nb(Ti) and Sn(Ga) solid solution powders
Author :
Thieme, C.L.H. ; Foner, S.
Author_Institution :
MIT, Cambridge, MA, USA
fDate :
3/1/1991 12:00:00 AM
Abstract :
Superconducting Nb3Sn wire was produced by a powder metallurgy method using Nb or Nb-2.9 at.% Ti powder in combination with Sn-x at.% Ga powders (x=3, 4.2, 6.2, and 9.0). Ga additions to the Sn caused considerable solid solution hardening, which improved its workability. It made the Nb-Sn(Ga) powder combination convenient for swaging and extensive wire drawing. Anneals at 950°C produced wires with an overall Jc of 104 A/cm2 at 21.9 T for wires with both Ti in the Nb and 6.2 at.% Ga in the Sn. Comparison of this wire with best Nb(Ti)-Cu-internal Sn(Ti) shows a higher Jc per A15 area, especially in fields of 22 T and above
Keywords :
composite superconductors; critical current density (superconductivity); drawing (mechanical); niobium alloys; powder metallurgy; superconducting critical field; tin alloys; type II superconductors; 22 T; 4.2 K; A15 superconductor; annealing; critical current density; critical field; powder metallurgy; solid solution hardening; superconducting Nb3Sn wire; superconducting magnets; swaging; wire drawing; workability; Annealing; Niobium; Powders; Production; Solids; Superconducting filaments and wires; Swaging; Tin; Wire drawing; Workability;
Journal_Title :
Magnetics, IEEE Transactions on
