Nb-A1 powder metallurgy processed multifilamentary wire

Conference · Fri Mar 01 04:00:00 EST 1985 · IEEE Trans. Magn.; (United States)

OSTI ID:6485459

Thieme, C L.H.; Foner, S; Pourrahimi, S; Schwartz, B B

Powder metallurgy processed Nb-Al wire with overall critical current densities, J /SUB c/ , at 4.2K up to 10/sup 4/A/cm/sup 2/ at 19T has been investigated in more detail. Kramer plots and directly measured H /SUB c2/ values of samples with different heat treatments show an increase in H /SUB c2/ at 4.2K up to 24.5T. Test coils, using long lengths of wire, and tested in fields up to 15T, show J /SUB c/ values equal to those of short samples. Multiple strand hydrostatic small scale extrusions were made. A number of third element additions including B, Mg, Co, Cr and Ni in fine powder form were incorporated in the P/M processing but these did not improve J /SUB c/ . ac losses were measured and used to determine J /SUB c/ at low fields. The high field ac losses are lower than that for any in Situ or powder processed Nb/sub 3/Sn wires.

• Research Organization: Francis Bitter National Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts
• OSTI ID: 6485459
• Report Number(s): CONF-840937-
• Conference Information: Journal Name: IEEE Trans. Magn.; (United States) Journal Volume: MAG 21:2
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101 -- Metals & Alloys-- Preparation & Fabrication
420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALLOYS
ALUMINIUM ALLOYS
BORON ALLOYS
BORON COMPOUNDS
CHROMIUM ALLOYS
COBALT ALLOYS
CRITICAL CURRENT
CURRENT DENSITY
CURRENTS
ELECTRIC CURRENTS
ENERGY LOSSES
FABRICATION
FILAMENTS
HEAT TREATMENTS
LOSSES
MAGNESIUM ALLOYS
METALLURGY
NICKEL ALLOYS
NIOBIUM ALLOYS
PERFORMANCE TESTING
POWDER METALLURGY
SUPERCONDUCTING WIRES
TESTING
WIRES