Kinetic neutron diffraction study of Nb3Sn phase formation in superconducting wires

Al-Jawad, M; Manuel, P; Ritter, C; Kilcoyne, SH

Abstract

The kinetics of Nb3Sn phase formation in commercial multifilamentary wires have been studied as a function of time and temperature using time-resolved, in situ neutron diffraction. This work shows that at higher temperatures the Nb3Sn phase forms in a fraction of the recommended annealing time. A temperature-independent Avrami exponent of n = 0.51 ± 0.01 was observed, indicating a diffusion-controlled growth mechanism, and a large apparent activation energy of Ea = 10 ± 1 eV is reported where the energies of nucleation and growth both contribute.

Citation

Al-Jawad, M., Manuel, P., Ritter, C., & Kilcoyne, S. (2006). Kinetic neutron diffraction study of Nb3Sn phase formation in superconducting wires. Journal of Physics: Condensed Matter, 18(4), 1449-1457. https://doi.org/10.1088/0953-8984/18/4/028

• Journal Article Type: Article
• Publication Date: Feb 1, 2006
• Deposit Date: Aug 22, 2007
• Journal: Journal of Physics: Condensed Matter
• Print ISSN: 0953-8984
• Publisher: IOP Publishing
• Peer Reviewed: Peer Reviewed
• Volume: 18
• Issue: 4
• Pages: 1449-1457
• DOI: https://doi.org/10.1088/0953-8984/18/4/028
• Publisher URL: http://dx.doi.org/10.1088/0953-8984/18/4/028