COMPOSITION, STRUCTURE AND CURRENT CARRYING CAPACITY OF Nb3Sn PHASE IN MULTIFILAMENT SUPERCONDUCTORS

The study was made into processes of formation and characteristic properties of the composition and structure of Nb3Sn formed in multifilament superconductors during annealing within 700-820°C for up to 200 h. The current carrying capacity of the above materials was studied in the field of < 18 T. It is established that the best critical current density of intermetallic Nb3Sn in low and high magnetic fields is achieved through dissimilar annealing schedules.