Casting of dendritic Cu-Nb alloys for superconducting wire

Journal Article · Mon Oct 01 04:00:00 EDT 1979 · Appl. Phys. Lett.; (United States)

DOI:https://doi.org/10.1063/1.91177· OSTI ID:5887111

Verhoeven, J D; Schmidt, F A; Gibson, E D; Ostenson, J E; Finnemore, D K

Consumable electrode-arc-casting techniques have been developed for the preparation of large billets of dendritic Cu-Nb alloys which are suitable for the fabrication of multifilamentary superconducting wire. The dendrite structure is somewhat more coarse than chill cast material but metallographic and chemical analyses show acceptably small radial and longitudinal segregation. The billets can be drawn to wire with no intermediate anneals. Both external diffusion after tin plating and internal diffusion of wire with a tin core can be used to transform the Nb filaments to Nb/sub 3/Sn. The arc cast wire displays J/sub c/ values equivalent to previously reported values on in situ wire at high fields, but somewhat lower values at low fields.

• Research Organization: Ames Laboratory-USDOE, Department of Materials Science and Engineering, and Department of Physics, Iowa State University, Ames, Iowa 50011
• OSTI ID: 5887111
• Journal Information: Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 35:7; ISSN APPLA
• Country of Publication: United States
• Language: English

Related Subjects

420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALLOYS
ANNEALING
CASTING
CHEMICAL ANALYSIS
COMPARATIVE EVALUATIONS
COPPER ALLOYS
CRYSTALS
DENDRITES
DEPOSITION
DIFFUSION
ELECTRODES
ELEMENTS
FABRICATION
FILAMENTS
HEAT TREATMENTS
METALLOGRAPHY
METALS
NIOBIUM ALLOYS
PLATING
SUPERCONDUCTING WIRES
SURFACE COATING
TIN
WIRES