Direct solid-state precipitation-processed A15 (Nb/sup 3/A1) superconducting material

Journal Article · Sun Nov 30 23:00:00 EST 1980 · Appl. Phys. Lett.; (United States)

DOI:https://doi.org/10.1063/1.91757· OSTI ID:6742825

Hong, M; Morris, Jr, J W

A ''solid-state precipitation'' process was used to prepare superconducting tapes containing Nb/sub 3/Al in a niobium matrix. Small ingots of Nb--(17--19 at . %)Al were prepared by arc melting, homogenizing, quenching, warm rolling into tape, and aging at 750--900/sup 0/C to precipitate the A15 phase. Transmission electron microscopy studies revealed Nb/sub 3/Al precipitation in fine particles which formed a semicontinuous network over subgrain boundaries fromed by the recovery of deformation-induced dislocations. Promising high-field critical currents were obtained (J/sub c/approx.10/sup 4/ A/cm/sup 2/ in a field of 14 T at 4.2 K).

• Research Organization: Department of Materials Science and Mineral Engineering and Materials and Molecular Research Division, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720.
• OSTI ID: 6742825
• Journal Information: Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 37:11; ISSN APPLA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360601* -- Other Materials-- Preparation & Manufacture
ALLOYS
ALUMINIUM ALLOYS
CRITICAL CURRENT
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
CURRENTS
DEFORMATION
DISLOCATIONS
ELECTRIC ARCS
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRIC DISCHARGES
ELECTRICAL PROPERTIES
ELECTRON MICROSCOPY
ELEMENTS
FABRICATION
GRAIN BOUNDARIES
LINE DEFECTS
MATERIALS WORKING
MELTING
METALS
MICROSCOPY
MICROSTRUCTURE
NIOBIUM
NIOBIUM ALLOYS
PARTICLES
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
PRECIPITATION
QUENCHING
REFRACTORY METALS
ROLLING
SEPARATION PROCESSES
SOLIDS
SUPERCONDUCTIVITY
SYNTHESIS
TRANSITION ELEMENTS
TRANSMISSION ELECTRON MICROSCOPY
VERY HIGH TEMPERATURE