Microstructure, impurity content and critical current density in Nb3Sn
- 1 April 1969
- journal article
- Published by IOP Publishing in Journal of Physics D: Applied Physics
- Vol. 2 (4) , 521-526
- https://doi.org/10.1088/0022-3727/2/4/307
Abstract
Critical current density measurements, transmission electron microscopy and chemical analysis have established a correlation between critical current density Jc, the oxygen content in Nb3Sn and the presence of a fine dispersion of precipitate. As the oxygen content increased from Jc increased from 1 to 6 × 105 A cm−2 at 46 kG. A fine precipitate (particle size similar 50 Å) was observed for all oxygen contents greater than 160 p.p.m. It is concluded that the precipitate particles act as flux-pinning centres in Nb3Sn. No correlation was observed between nitrogen content and Jc.Keywords
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