Improved high field performance of Nb-Al powder metallurgy processed superconducting wires

Journal Article · Sun Jan 15 04:00:00 EST 1984 · Appl. Phys. Lett.; (United States)

DOI:https://doi.org/10.1063/1.94691· OSTI ID:5559602

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

Improved overall critical current densities J/sub c/'s were achieved with powder metallurgy processed Nb-A1 which combined reduced powder sizes and increased nominal areal reductions R. Increased J/sub c/ values were obtained for a variety of different heat treatments. For a Nb-8 wt. % A1 wire with R = 3.4 x 10/sup 5/ a very short treatment at 1100 /sup 0/C followed by a 750 /sup 0/C treatment gave (at 4.2 K)J/sub c/>10/sup 4/ A/cm/sup 2/ at 19 T; a 900 /sup 0/C treatment followed by a 750 /sup 0/C treatment gave J/sub c/ = 10/sup 4/ A/cm/sup 2/ at 18 T and, at 2 K, J/sub c/ was greater than 10/sup 4/ A/cm/sup 2/ at 20 T; and a treatment of 800 /sup 0/C for 8 h gave (at 4.2 K)J/sub c/ = 10/sup 4/ A/cm/sup 2/ at 17.5 T.

• Research Organization: Francis Bitter National Magnet Laboratory, Massachusetts, Institute of Technology, Cambridge, Massachusetts 02139
• OSTI ID: 5559602
• Journal Information: Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 44:2; ISSN APPLA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
656102 -- Solid State Physics-- Superconductivity-- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM
AUGMENTATION
CRITICAL CURRENT
CURRENT DENSITY
CURRENTS
ELECTRIC CURRENTS
ELEMENTS
HEAT TREATMENTS
MAGNETS
METALLURGY
METALS
NIOBIUM
POWDER METALLURGY
SUPERCONDUCTING WIRES
SUPERCONDUCTORS
TRANSITION ELEMENTS
TYPE-II SUPERCONDUCTORS
VERY HIGH TEMPERATURE
WIRES