Fabrication of superconductors. [NbTi in Cu, CuNi matrix]
Conference
·
OSTI ID:7263975
The paper discusses the development of a process for making high performance, fine-filament superconducting wires, utilizing dual matrix stabilization and Nb/sub 46/Ti superconducting filaments. Minimum filament size-achieved was 8 ..mu..m using OFHC copper and Cu/sub 30/Ni matrix materials. Ductility of the NbTi starting material was found to exert a major influence on the properties of the finished wire, and specifications for acceptable NbTi were developed. When specific impurity levels are exceeded, micron size precipitates and large inclusions are found. A rigorous stacking and extrusion procedure was developed. Very high density billets for extrusion were obtained by such techniques as co-drawing the stacking elements, contouring shells on a gear shaper, and hydrostatic compaction. Extrusion parameters discussed are reduction ratios, temperatures, and working speeds. (auth)
- Research Organization:
- Los Alamos Scientific Lab., N.Mex. (USA)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 7263975
- Report Number(s):
- LA-UR-76-360; CONF-760508-1
- Country of Publication:
- United States
- Language:
- English
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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
ALLOYS
CABLES
COMPOSITE MATERIALS
CONDUCTOR DEVICES
COPPER
COPPER ALLOYS
ELECTRIC CABLES
ELECTRICAL EQUIPMENT
ELEMENTS
EQUIPMENT
EXTRUSION
FABRICATION
FILAMENTS
MATERIALS WORKING
METALS
NICKEL ALLOYS
NIOBIUM ALLOYS
SUPERCONDUCTING CABLES
TITANIUM ALLOYS
TRANSITION ELEMENTS
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
ALLOYS
CABLES
COMPOSITE MATERIALS
CONDUCTOR DEVICES
COPPER
COPPER ALLOYS
ELECTRIC CABLES
ELECTRICAL EQUIPMENT
ELEMENTS
EQUIPMENT
EXTRUSION
FABRICATION
FILAMENTS
MATERIALS WORKING
METALS
NICKEL ALLOYS
NIOBIUM ALLOYS
SUPERCONDUCTING CABLES
TITANIUM ALLOYS
TRANSITION ELEMENTS