Method of preparing composite superconducting wire

Patent · Tue Aug 06 00:00:00 EDT 1985

OSTI ID:865539

Verhoeven, John D ^[1]; Gibson, Edwin D ^[1]; Finnemore, Douglas K ^[1]; Ostenson, Jerome E ^[1]; Schmidt, Frederick A ^[1]; Owen, Charles V ^[1]

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1. Ames, IA

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.

• Research Organization: Ames Laboratory (AMES), Ames, IA; Iowa State University, Ames, IA (US)
• DOE Contract Number: W-7405-ENG-82
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4532703
• Application Number: 06/257,013
• OSTI ID: 865539
• Country of Publication: United States
• Language: English

Related Subjects

/148/29/75/174/219/420/505/
15
alloy
billet
billets
casting
coating
coils
composite
composite superconducting
conducting wire
consumable-arc
containing
copper
copper containing
copper matrix
copper-niobium
cylindrical
dendritic-shaped
described
devices
diffuse
discrete
distributed
drawing
drawn
drawn wire
ductile
eliminates
filament
filled
form
forming
generalized
heating
improved
improved method
longitudinal
magnet
magnet coils
matrix
method
multifilament
multifilament wire
nb
necessity
niobium
niobium alloy
oriented
particles
percent
percent niobium
preparing
preparing composite
provided
randomly
react
rod
shaped particles
superconducting
superconducting wire
weight
weight percent
wire
wound