Design parameters for processing flexible Nb/sub 3/Al high field superconducting tapes and wires

Technical Report · Mon Dec 01 04:00:00 EST 1975

DOI:https://doi.org/10.2172/7353287· OSTI ID:7353287

Ciardella, R L

A process was developed to fabricate Nb/sub 3/Al composite wires at a temperature below 1000/sup 0/C. This process consists of a solution heat treatment which forms a metastable solid solution upon quenching. The solid solution transforms to the A-15 phase by subsequent low-temperature aging. The onset temperature of superconductivity of the resulting material, as measured inductively, was 17.6 +- 0.5/sup 0/K. This is 2/sup 0/K higher than has been previously reported for Nb/sub 3/Al formed below 1000/sup 0/C. Using this process, large Nb/sub 3/Al layers are formed in a ductile Nb matrix. Extensive twinning were observed to occur in the metastable solid solution subjected to plastic deformation. Results can provide the basis for the development of a process for producing a fully stabilized Nb/sub 3/Al conductor with high values of T/sub c/ and J/sub c/. 18 figures (auth)

• Research Organization: California Univ., Berkeley (USA). Lawrence Berkeley Lab.
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 7353287
• Report Number(s): LBL-4174
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
420201 -- Engineering-- Cryogenic Equipment & Devices
656102 -- Solid State Physics-- Superconductivity-- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
AGING
ALLOYS
ALUMINIUM ALLOYS
COMPOSITE MATERIALS
DISPERSIONS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
FABRICATION
HEAT TREATMENTS
INTERMETALLIC COMPOUNDS
MATRIX MATERIALS
METALS
MIXTURES
NIOBIUM
NIOBIUM ALLOYS
NIOBIUM BASE ALLOYS
PHYSICAL PROPERTIES
REACTOR MATERIALS
REFRACTORY METALS
SOLID SOLUTIONS
SOLUTIONS
SUPERCONDUCTING COMPOSITES
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENTS
TRANSITION TEMPERATURE
TWINNING
WIRES