Effects of Heat Treatments on the Nb3Sn Composite Strands


Article Preview

Nb3Sn superconductors are widely used in high magnetic field application. Internal tin processed Nb3Sn wires used for ITER coils (at 4.2K, 12T) were heated by two steps, local heat treatment and reaction heat treatments. The superconducting properties of Nb3Sn were investigated as a function of reaction heat treatment (HT) for strands during 625°C~665°C.To study the heat treatment effects on Jcn and n-value of Nb3Sn strands, different HT-parameters, i.e., annealing temperature and times, were applied on the Nb3Sn multifilament strands.



Materials Science Forum (Volumes 546-549)

Edited by:

Yafang Han et al.




M. Liang et al., "Effects of Heat Treatments on the Nb3Sn Composite Strands", Materials Science Forum, Vols. 546-549, pp. 2023-2026, 2007

Online since:

May 2007




[1] Summers, L. T., Duenas, A. R., Karlsen, C. E., Ozeryansky, G. M. and Gregory, E., IEEE Trons. Vol. 27 (1991), p.1763.

[2] Sara Mattafirri, Emanuela Barzi, Fabio Fineschi, and Jean-Michel Rey, IEEE Trons. Vol. 13 (2003), p.3418.

[3] M.T. Naus, M.C. Jewell, PJ. Lee and D.C. Larbalestier, Advances in Cryogenic Engineering: Proceedings of the International Cryogenic Materials Conference - ICMC, Vol. 48, edited by B. Balachandran et al. (2002).

[4] D. W. Ha, S. S. Oh, N. J. Lee, H, S. Ha, J. H. Bae, Y. K. Kwon, K. S. Ryu, IEEE Trons. Vol. 10 (2000), p.992.

[5] R. M. Scanlan, W. A. Fietz, E. F. Koch, J. Appl. Phys., vol. 46 (5) (1975), p.2244.

[6] E. J. Kramer, J. Appl. Phys. , Vol. 44, (1973), p.1360.

[7] Peter J. Lee and David C. Larbalestier, Proceedings of the 2003 Particle Accelerator Conference, p.151.

[8] C.M. Fischer, Investigation of the Relationships Between Superconducting Properties and Nb3Sn Reaction Conditions in Powder-in-Tube Nb3Sn Conductors, M.S. thesis, Univ. of Wisconsin, Madison WI, USA (2002).

[9] H. Müller, Th. Schneider, Physica C, vol. 401 (2004), p.325.