Scaleup of powder metallurgy processed Nb-Al multifilamentary wire

Journal Article · Sun May 01 04:00:00 EDT 1983 · IEEE Trans. Magn.; (United States)

DOI:https://doi.org/10.1109/TMAG.1983.1062505· OSTI ID:5612557

Thieme, C; Foner, S; Otubo, J; Pourrahimi, S; Schwartz, B; Zhang, H

Power metallurgy processed Nb-Al superconducting wires were fabricated from billets up to 45 mm o.d. with nominal areal reduction ratios, R, up to 2 X 10/sup 5/, Nb powder sizes from 40 to 300 ..mu..m from various sources, Al powder sizes from 9 to 75 ..mu..m, Al concentrations from 3 to 25 wt % Al and with a wide range of heat treatments. All the compacts used tap density powder in a Cu tube and swaging and/or rod rolling and subsequent wire drawing. Both single strand and bundled wires were made. Overall critical current densities, J /SUB c/, of 2 X 10/sup 4/ A/cm/sup 2/ at 14 T and 10/sup 4/ A/cm/sup 2/ at 16 T were achieved for 6 to 8 wt % Al in Nb.

• Research Organization: Francis Bitter National Magnet Lab. and Plasma Fusion Center Massachusetts Instit. of Techn., Cambridge, MA 02139
• OSTI ID: 5612557
• Journal Information: IEEE Trans. Magn.; (United States), Journal Name: IEEE Trans. Magn.; (United States) Vol. 19:3; ISSN IEMGA
• Country of Publication: United States
• Language: English

Related Subjects

420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALLOY SYSTEMS
ALUMINIUM
BINARY ALLOY SYSTEMS
COPPER
CURRENT DENSITY
ELEMENTS
HEAT TREATMENTS
METALLURGY
METALS
NIOBIUM
POWDER METALLURGY
SUPERCONDUCTING WIRES
TRANSITION ELEMENTS
WIRES