Method of preparing composite superconducting wire

Patent · Tue Aug 06 04:00:00 EDT 1985

OSTI ID:6486219

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

An improved method of preparing composite multifilament superconducting wire of Nb/sub 3/Sn in a copper matrix which eliminates the necessity of coating the drawn wire with tin. A generalized cylindrical billet of an alloy of copper containing at least 15 weight percent niobium, present in the copper as discrete, randomly distributed and oriented dendritic-shaped particles, is provided with at least one longitudinal opening which is filled with tin to form a composite drawing rod. The drawing rod is then drawn to form a ductile composite multifilament wire containing a filament of tin. The ductile wire containing the tin can then be wound into magnet coils or other devices before heating to diffuse the tin through the wire to react with the niobium forming Nb/sub 3/Sn. Also described is an improved method for making large billets of the copper-niobium alloy by consumable-arc casting.

• Assignee: The United States of America as represented by the United States Department of Energy
• Patent Number(s): US 4532703
• OSTI ID: 6486219
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101 -- Metals & Alloys-- Preparation & Fabrication
420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALLOYS
CHEMICAL COMPOSITION
COMPOSITE MATERIALS
COPPER ALLOYS
DUCTILITY
ELECTRIC COILS
ELECTRICAL EQUIPMENT
EQUIPMENT
FABRICATION
FILAMENTS
MAGNET COILS
MATERIALS
MECHANICAL PROPERTIES
NIOBIUM ALLOYS
QUANTITY RATIO
RODS
SUPERCONDUCTING COMPOSITES
SUPERCONDUCTING WIRES
TENSILE PROPERTIES
TIN ALLOYS
WIRES