Intermediate scale industrially processed Nb/sub 3/Sn(Ti) by powder metallurgy

Conference · Wed Mar 01 04:00:00 EST 1989 · IEEE Trans. Magn.; (United States)

OSTI ID:6086069

Pourrahimi, S; Tnieme, C L.H.; Foner, S

The authors' powder metallurgy processing of Nb/sub 3/Sn(Ti) wire was scaled up to 75 mm diameter billets each containing 4 kg of pressed powder composite. Prealloyed Nb-1.5wt%Ti powder was used for optimum high field properties. An initial hot extrusion step provided complete consolidation and excellent integrity of the powder composite. Using the extruded bars, various single and multiple tin core billets were prepared and hydrostatically extruded to 12 mm diameter bars. Long lengths of internal tin core wire were drawn without any breakage to less than 1 mm diameter. In order to evaluate the performance of long length wires, small magnets were fabricated from these wires and tested in background fields of water-cooled Bitter magnets up to 20 tesla. J/sub c/=10/sup 4/A/cm/sup 2/ was measured at 20T (equal to the short sample performance) and n-values at high fields were comparable to, or better than those of conventional Nb/sub 3/Sn(Ti) wires. The processing, performance and microstructure is discussed. This intermediate scale process used conventional metal forming techniques that can be scaled to larger P/M industrial processing.

• Research Organization: 9502899; 9510048
• OSTI ID: 6086069
• Report Number(s): CONF-880812-
• Conference Information: Journal Name: IEEE Trans. Magn.; (United States) Journal Volume: 25:2
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
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Cermets
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Cermets
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656100 -- Condensed Matter Physics-- Superconductivity
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALLOYS
CRYSTAL STRUCTURE
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
FABRICATION
HOT PRESSING
MAGNETIC FIELDS
MATERIALS WORKING
METALLURGY
MICROSTRUCTURE
NIOBIUM ALLOYS
NIOBIUM BASE ALLOYS
PERFORMANCE
PHYSICAL PROPERTIES
POWDER METALLURGY
PRESSING
PROCESSING
SUPERCONDUCTING WIRES
SUPERCONDUCTIVITY
TIN ALLOYS
WIRES