Method of manufacturing a niobium-aluminum-germanium superconductive material

Patent · Tue Jan 01 00:00:00 EST 1980

OSTI ID:863654

Wang, John L ^[1]; Pickus, Milton R ^[2]; Douglas, Kent E ^[3]

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1. San Francisco, CA
2. Oakland, CA
3. Redondo Beach, CA

A method for manufacturing flexible Nb.sub.3 (Al,Ge) multifilamentary superconductive material in which a sintered porous niobium compact is infiltrated with an aluminum-germanium alloy and thereafter deformed and heat treated in a series of steps at different successively higher temperatures preferably below 1000.degree. C. to produce filaments composed of Nb.sub.3 (Al,G3) within the compact. By avoiding temperatures in excess of 1000.degree. C. during the heat treatment, cladding material such as copper can be applied to facilitate a deformation step preceding the heat treatment and can remain in place through the heat treatment to also serve as a temperature stabilizer for supeconductive material produced. Further, these lower heat treatment temperatures favor formation of filaments with reduced grain size and, hence with more grain boundaries which in turn increase the current-carrying capacity of the superconductive material.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• DOE Contract Number: W-7405-ENG-48
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4223434
• OSTI ID: 863654
• Country of Publication: United States
• Language: English

Related Subjects

method
manufacturing
niobium-aluminum-germanium
superconductive
material
flexible
nb
multifilamentary
sintered
porous
niobium
compact
infiltrated
aluminum-germanium
alloy
thereafter
deformed
heat
treated
series
steps
successively
temperatures
preferably
below
1000
degree
produce
filaments
composed
g3
avoiding
excess
treatment
cladding
copper
applied
facilitate
deformation
step
preceding
remain
serve
temperature
stabilizer
supeconductive
produced
favor
formation
reduced
grain
size
hence
boundaries
increase
current-carrying
capacity
material produced
grain boundaries
conductive material
grain size
heat treatment
heat treated
superconductive material
cladding material
carrying capacity
sintered porous
flexible nb
/29/148/419/428/505/