Research on the monolithic process of making A-15 superconducting materials
Conference
·
OSTI ID:5583463
It is possible to produce high T/sub c/ wires or tapes from the V-Ga system by a monolithic process in which an ingot is cast as a supersaturated solution of V and Ga, homogenized at elevated temperature, quenched to preserve the supersaturation, formed into a wire or tape, and finally heat treated at a relatively low temperature to precipitate the superconducting phase. To achieve exceptionally high critical temperatures, the precipitation reaction must be carried out at temperatures below approximately 750/sup 0/C. The measured critical temperature then becomes a function of the aging time, and reaches a maximum value as high as 14.8/sup 0/K in alloys containing 17 to 19 at. % Ga. The reason for the exceptionally high critical temperature when the precipitation is carried out at lower aging temperatures is not established, but may be plausibly interpreted as due to a thermodynamic tendency for small precipitates formed from highly supersaturated solid solutions to be rich in solute content.
- Research Organization:
- California Univ., Berkeley (USA). Lawrence Berkeley Lab.
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 5583463
- Report Number(s):
- LBL-10007; CONF-790815-33
- Country of Publication:
- United States
- Language:
- English
Similar Records
Development of A-15 (V/sub 3/Ga) superconducting material through controlled precipitation
A15 superconductors through direct solid-state precipitation: V/sub 3/Ga and Nb/sub 3/Al
A15 superconductors through direct solid-state precipitation: V/sub 3/Ga and Nb/sub 3/Al
Journal Article
·
Thu May 01 00:00:00 EDT 1980
· J. Appl. Phys.; (United States)
·
OSTI ID:5396238
A15 superconductors through direct solid-state precipitation: V/sub 3/Ga and Nb/sub 3/Al
Technical Report
·
Mon Sep 01 00:00:00 EDT 1980
·
OSTI ID:6769991
A15 superconductors through direct solid-state precipitation: V/sub 3/Ga and Nb/sub 3/Al
Thesis/Dissertation
·
Mon Dec 31 23:00:00 EST 1979
·
OSTI ID:5399020
Related Subjects
36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
656102 -- Solid State Physics-- Superconductivity-- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
AGING
ALLOYS
CRITICAL TEMPERATURE
DISPERSIONS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
FABRICATION
GALLIUM ALLOYS
HEAT TREATMENTS
INTERMETALLIC COMPOUNDS
MIXTURES
PHYSICAL PROPERTIES
PRECIPITATION
QUENCHING
SEPARATION PROCESSES
SOLID SOLUTIONS
SOLUTIONS
SUPERCONDUCTING WIRES
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
VANADIUM ALLOYS
WIRES
360101* -- Metals & Alloys-- Preparation & Fabrication
656102 -- Solid State Physics-- Superconductivity-- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
AGING
ALLOYS
CRITICAL TEMPERATURE
DISPERSIONS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
FABRICATION
GALLIUM ALLOYS
HEAT TREATMENTS
INTERMETALLIC COMPOUNDS
MIXTURES
PHYSICAL PROPERTIES
PRECIPITATION
QUENCHING
SEPARATION PROCESSES
SOLID SOLUTIONS
SOLUTIONS
SUPERCONDUCTING WIRES
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
VANADIUM ALLOYS
WIRES