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The transverse stress effect on the critical current of jelly-roll multifilamentary Nb sub 3 Al wires

Conference · · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)
OSTI ID:5901426
 [1];  [2]; ; ; ; ;  [3]
  1. Booz-Allen-Hamilton, Bethesda, MD (US)
  2. Massachusetts Inst. of Tech., Cambridge, MA (United States). Plasma Fusion Center
  3. Naka Fusion Research Center, Japan Atomic Energy Research Inst., Naka-machi, Ibaraki-ken 31911 (JP)
+ Show Author Affiliations

This paper reports on experiments conducted to determine the effect of transverse compressive stress (TCS) on the critical current of jelly-roll multifilamentary Nb{sub 3}Al wire (0.8-mm dia.) for magnetic flux densities up to 12 T. For comparison, identical experiments were performed for bronze-process Ti-alloyed multifilamentary Nb{sub 3}Sn wire (1.0-mm dia.). Although the unstressed critical current density of Nb{sub 3}Al was inferior to that of (NbTi){sub 3}Sn at high fields, under applied TCS Nb{sub 3}Al exhibited less critical current degradation than (NbTi){sub 3}Sn. For example, at 12 T and 150 MPa, TCS-induced critical current degradation was approximately 20% for Nb{sub 3}Al, whereas it was approximately 65% for (NbTi){sub 3}Sn. There is optimism that Nb{sub 3}Al will evolve into a useful superconductor for large-scale, high-field applications.

OSTI ID:
5901426
Report Number(s):
CONF-900944--
Journal Information:
IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States), Journal Name: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States) Vol. 27:2; ISSN IEMGA; ISSN 0018-9464
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
360103 -- Metals & Alloys-- Mechanical Properties
360107 -- Metals & Alloys-- Superconducting Properties-- (1992-)
665412* -- Superconducting Devices-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALLOYS
ALUMINIUM ALLOYS
COMPARATIVE EVALUATIONS
COMPRESSION
COMPRESSION STRENGTH
CRITICAL CURRENT
CURRENT DENSITY
CURRENTS
ELECTRIC CURRENTS
EVALUATION
FILAMENTS
FLUX DENSITY
MAGNETIC FLUX
MECHANICAL PROPERTIES
NIOBIUM ALLOYS
NIOBIUM BASE ALLOYS
STRESSES
SUPERCONDUCTING WIRES
TIN ALLOYS
TITANIUM ALLOYS
WIRES