Niobium-titanium superconductors produced by powder metallurgy having artificial flux pinning centers
Abstract
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.
- Inventors:
-
- Madison, WI
- Issue Date:
- Research Org.:
- Univ. of Wisconsin, Madison, WI (United States)
- OSTI Identifier:
- 868850
- Patent Number(s):
- 5226947
- Assignee:
- Wisconsin Alumni Research Foundation (Madison, WI)
- Patent Classifications (CPCs):
-
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- DOE Contract Number:
- AC02-82ER40077
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- niobium-titanium; superconductors; produced; powder; metallurgy; artificial; flux; pinning; centers; formed; matrix; alloy; discrete; distributed; therein; compatible; metal; nb-ti; reduced; size; processing; steps; sizes; coherence; length; typically; range; 10; nm; produce; superconductor; powders; centered; cubic; phase; material; nb; mixed; desired; percentages; mixture; isostatically; pressed; sintered; selected; temperature; time; cohesive; structure; characteristics; undue; chemical; reaction; billet; deformation; swaging; swaged; sample; receives; heat; treatment; recrystallization; additional; sheathed; normal; conducting; sheath; drawn; wire; resulting; superconducting; provide; enhanced; due; effects; flux pinning; coherence length; selected time; pinning centers; titanium alloy; chemical reaction; heat treatment; superconducting wire; processing steps; selected temperature; isostatically pressed; processing step; powder metallurgy; centered cubic; receives heat; provide enhanced; distributed therein; compatible metal; conducting wire; /75/252/419/420/428/505/
Citation Formats
Jablonski, Paul D, and Larbalestier, David C. Niobium-titanium superconductors produced by powder metallurgy having artificial flux pinning centers. United States: N. p., 1993.
Web.
Jablonski, Paul D, & Larbalestier, David C. Niobium-titanium superconductors produced by powder metallurgy having artificial flux pinning centers. United States.
Jablonski, Paul D, and Larbalestier, David C. Fri .
"Niobium-titanium superconductors produced by powder metallurgy having artificial flux pinning centers". United States. https://www.osti.gov/servlets/purl/868850.
@article{osti_868850,
title = {Niobium-titanium superconductors produced by powder metallurgy having artificial flux pinning centers},
author = {Jablonski, Paul D and Larbalestier, David C},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jan 01 00:00:00 EST 1993},
month = {Fri Jan 01 00:00:00 EST 1993}
}
Works referenced in this record:
Development of in-situ second phase pinning structure in niobium-titanium based superconducting alloys
journal, March 1991
- Seuntjens, J. M.; Larbalestier, D. C.
- IEEE Transactions on Magnetics, Vol. 27, Issue 2