Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

Niobium-titanium superconductors produced by powder metallurgy having artificial flux pinning centers

Patent ·
OSTI ID:868850
 [1];  [1]
  1. Madison, WI
+ Show Author Affiliations
Superconductors formed by powder metallurgy have a matrix of niobium-titanium alloy with discrete pinning centers distributed therein which are formed of a compatible metal. The artificial pinning centers in the Nb-Ti matrix are reduced in size by processing steps to sizes on the order of the coherence length, typically in the range of 1 to 10 nm. To produce the superconductor, powders of body centered cubic Nb-Ti alloy and the second phase flux pinning material, such as Nb, are mixed in the desired percentages. The mixture is then isostatically pressed, sintered at a selected temperature and selected time to produce a cohesive structure having desired characteristics without undue chemical reaction, the sintered billet is reduced in size by deformation, such as by swaging, the swaged sample receives heat treatment and recrystallization and additional swaging, if necessary, and is then sheathed in a normal conducting sheath, and the sheathed material is drawn into a wire. The resulting superconducting wire has second phase flux pinning centers distributed therein which provide enhanced J.sub.ct due to the flux pinning effects.
Research Organization:
UNIVERSITY OF WISCONSIN
DOE Contract Number:
AC02-82ER40077
Assignee:
Wisconsin Alumni Research Foundation (Madison, WI)
Patent Number(s):
US 5226947
OSTI ID:
868850
Country of Publication:
United States
Language:
English

References (1)

Development of in-situ second phase pinning structure in niobium-titanium based superconducting alloys journal March 1991

Similar Records

Niobium-titanium superconductors produced by powder metallurgy having artificial flux pinning centers
Patent · Tue Jul 13 00:00:00 EDT 1993 · OSTI ID:6312322
Characterization of Nb-Ti superconductors with artificial pinning structures
Conference · Fri Jun 01 00:00:00 EDT 1990 · OSTI ID:5196025
Scaleup of powder metallurgy processed Nb-Al multifilamentary wire
Journal Article · Sun May 01 00:00:00 EDT 1983 · IEEE Trans. Magn.; (United States) · OSTI ID:5612557

Related Subjects

/75/252/419/420/428/505/
10
additional
alloy
artificial
billet
centered
centered cubic
centers
characteristics
chemical
chemical reaction
coherence
coherence length
cohesive
compatible
compatible metal
conducting
conducting wire
cubic
deformation
desired
discrete
distributed
distributed therein
drawn
due
effects
enhanced
flux
flux pinning
formed
heat
heat treatment
isostatically
isostatically pressed
length
material
matrix
metal
metallurgy
mixed
mixture
nb
nb-ti
niobium-titanium
nm
normal
percentages
phase
pinning
pinning centers
powder
powder metallurgy
powders
pressed
processing
processing step
processing steps
produce
produced
provide
provide enhanced
range
reaction
receives
receives heat
recrystallization
reduced
resulting
sample
selected
selected temperature
selected time
sheath
sheathed
sintered
size
sizes
steps
structure
superconducting
superconducting wire
superconductor
superconductors
swaged
swaging
temperature
therein
time
titanium alloy
treatment
typically
undue
wire