The effect of magnetic impurities and barriers on the magnetization and critical current of fine filament NbTi composites
Conference
·
· IEEE Trans. Magn.; (United States)
OSTI ID:6449848
It has been shown that the highest critical currents in fine filament NbTi conductors are obtained when the filaments are closely spaced. However, the filaments in a composite with a high purity copper matrix tend to be coupled via the ''proximity effect'' as the filament spacing is reduced leading to large magnetization at low fields. To reduce the ''proximity'' coupling, trial billets of NbTi have been fabricated with Cu-30% Ni matrix, Cu-0.5% Mn matrix and one with a Ni barrier around the filaments. Wires drawn from these billets have shown that this interfilament coupling can be suppressed for very small filament separations. A full sized commercial bullet with Cu-0.5% Mn matrix demonstrates that high J/sub c/ conductors with filament size -- 1-5 ..mu..m can be fabricated which show no interfilament coupling at low fields.
- Research Organization:
- Brookhaven National Lab., Upton, NY (US)
- OSTI ID:
- 6449848
- Report Number(s):
- CONF-870901-
- Conference Information:
- Journal Name: IEEE Trans. Magn.; (United States) Journal Volume: 24:2
- Country of Publication:
- United States
- Language:
- English
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