Multifilamentary Nb-Hf/Cu-Sn-Ga composite wires

Conference · Fri Jan 01 04:00:00 EST 1982 · Adv. Cryog. Eng.; (United States)

OSTI ID:6209217

Kamata, K; Alhara, K; Sekine, H; Tachikawa, K

This paper reports the procedure for the simultaneous addition of hafnium to the core and gallium to the matrix of the composite-processed multifilamentary Nb/sub 3/Sn superconductors and the effect of this addition on the high-field superconducting properties of the alloy. Specifications for the samples are given; a four-probe resistive method was used to measure their critical temperature and critical current. The strain dependence of the critical current was measured using an apparatus designed to apply a tensile strain, a current, and a perpendicular magnetic field at the same time to short wire samples at 4.2 K. Metallographic studies demonstrated that niobium-hafnium cores with hafnium content up to 5 at .% showed good workability. The simultaneous addition of hafnium to the core and gallium to the matrix increased the critical temperature by 0.4 to 0.6 K and also significantly improved the critical current density in high fields.

• Research Organization: Hitachi Cagle, Ltd., Tsuchiura
• OSTI ID: 6209217
• Report Number(s): CONF-810835-
• Conference Information: Journal Name: Adv. Cryog. Eng.; (United States) Journal Volume: 28
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
COMPOSITE MATERIALS
COPPER ADDITIONS
COPPER ALLOYS
CRITICAL CURRENT
CRYOGENICS
CURRENTS
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
GALLIUM ADDITIONS
GALLIUM ALLOYS
HAFNIUM ADDITIONS
HAFNIUM ALLOYS
MATERIALS
METALLURGICAL EFFECTS
NIOBIUM ALLOYS
PHYSICAL PROPERTIES
SUPERCONDUCTING WIRES
SUPERCONDUCTIVITY
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TIN ALLOYS
TRANSITION TEMPERATURE
WIRES