Filament-size dependent critical current of multifilamentary Nb/sub 3/Sn conductors

Conference · Tue Sep 01 04:00:00 EDT 1981 · IEEE Trans. Magn.; (United States)

OSTI ID:6336412

Rupp, G; Wohlleben, K; Springer, E

The critical current density of multifilamentary Nb/sub 3/Sn conductors depends on the diameter of the filaments. At low fields (less than about 12 T) this density increases with decreasing filament diameter because of the finer grain size. At high fields it increases with increasing filament diameter. Measurement of the critical current under externally applied tensile stress revealed that changes of the internal compression of the Nb/sub 3/Sn within the composite account for this effect. The larger the filament diameter, the smaller the compressive strain, the higher the upper critical field and therefore the critical current density at high fields. The decrease of compressive strain with increasing filament size results from a decrease in the yield stress of the bronze which is caused by an increase in grain size of the bronze between the filaments. 8 refs.

• Research Organization: Siemens, Erlangen, Ger
• OSTI ID: 6336412
• Report Number(s): CONF-810340-
• Conference Information: Journal Name: IEEE Trans. Magn.; (United States) Journal Volume: MAG-17:5
• Country of Publication: United States
• Language: English

Related Subjects

420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALLOYS
CABLES
CONDUCTOR DEVICES
CRITICAL CURRENT
CURRENT DENSITY
CURRENTS
ELECTRIC CABLES
ELECTRIC CURRENTS
ELECTRICAL EQUIPMENT
EQUIPMENT
FILAMENTS
NIOBIUM ALLOYS
NIOBIUM BASE ALLOYS
SIZE
STRESSES
SUPERCONDUCTING CABLES
SUPERCONDUCTORS
TIN ALLOYS