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Improved high-field performance in Nb/sub 3/Sn conductor prepared from intermediate compound.
- Source :
-
IEEE Transactions on Applied Superconductivity . 1997, Vol. 7 Issue 2, p1355-1359. 5p. - Publication Year :
- 1997
-
Abstract
- Nb/sub 3/Sn superconductors have been fabricated using Nb/sub 6/Sn/sub 5/ intermediate compound powder synthesized by a melt diffusion process. The mixed powder of Nb/sub 6/Sn/sub 5/ and Nb was encased in a Ta tube, and then fabricated into a tape without intermediate annealing. A Cu sheath with a Ta barrier was also used for the fabrication. The Nb/sub 3/Sn tape shows a B/sub c1/ of 24.7 T at 4.2 K after the reaction at 900/spl deg/C. In addition the B/sub c2/ increased further by Ti doping. Moreover, the addition of 0.5-1.0 wt% Ge produces appreciable improvements in Tc and Jc at high magnetic fields. A Jc (Nb/sub 3/Sn) of 2.7/spl times/10/sup 4/ A/cm/sup 2/ has been obtained at 21 T and 4.2 K in the Ge-doped specimen. A small amount of Cu addition decreases the optimum reaction temperature to 800-850/spl deg/C. Present Nb/sub 3/Sn conductors seem to be useful for NMR high-field magnets as well as for refrigerator-cooled superconducting magnets. [ABSTRACT FROM PUBLISHER]
Details
- Language :
- English
- ISSN :
- 10518223
- Volume :
- 7
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Applied Superconductivity
- Publication Type :
- Academic Journal
- Accession number :
- 93047058
- Full Text :
- https://doi.org/10.1109/77.620821