The microstructural state of Nb/sub 3/Sn in a multifilamentary titanium doped bronze-process wire
Conference
·
· IEEE Trans. Magn.; (United States)
OSTI ID:6340032
The addition of titanium to bronze-processed Nb/sub 3/Sn wires is known to increase the upper critical field and thus improve the high field performance. High resolution studies were done to determine the effect, if any, on the microstructure caused by Ti addition. This work used a Hitachi wire with a Nb filament diameter of 3.5 ..mu..m and a bronze to niobium ratio of 2.5. The bronze matrix had 7.5 at .% Sn and 0.4 at .% Ti. The microstructure of the Nb/sub 3/Sn layer was studied in TEM on axial and longitudinal wire sections and in SEM on fractured wire surfaces. The results were compared with a previous study on a similarly processed Ti free wire. It was found that the Ti addition caused no qualitative change in the microstructure. This result is contrasted with previous work on the beneficial effect of Mg additions which have been shown to be predominantly microstructural.
- Research Organization:
- Lawrence Berkeley Laboratory, University of California, Berkeley
- OSTI ID:
- 6340032
- Report Number(s):
- CONF-840937-
- Conference Information:
- Journal Name: IEEE Trans. Magn.; (United States) Journal Volume: MAG 21:2
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360102 -- Metals & Alloys-- Structure & Phase Studies
360104 -- Metals & Alloys-- Physical Properties
420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
BRONZE
CHEMICAL COMPOSITION
COPPER ALLOYS
COPPER BASE ALLOYS
CRITICAL FIELD
CRYSTAL STRUCTURE
DOPED MATERIALS
ELECTRON MICROSCOPY
FABRICATION
FILAMENTS
MAGNESIUM COMPOUNDS
MAGNETIC FIELDS
MATERIALS
MICROSCOPY
MICROSTRUCTURE
NIOBIUM ALLOYS
RESOLUTION
SCANNING ELECTRON MICROSCOPY
SUPERCONDUCTING WIRES
TIN ALLOYS
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSMISSION ELECTRON MICROSCOPY
WIRES
360102 -- Metals & Alloys-- Structure & Phase Studies
360104 -- Metals & Alloys-- Physical Properties
420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
BRONZE
CHEMICAL COMPOSITION
COPPER ALLOYS
COPPER BASE ALLOYS
CRITICAL FIELD
CRYSTAL STRUCTURE
DOPED MATERIALS
ELECTRON MICROSCOPY
FABRICATION
FILAMENTS
MAGNESIUM COMPOUNDS
MAGNETIC FIELDS
MATERIALS
MICROSCOPY
MICROSTRUCTURE
NIOBIUM ALLOYS
RESOLUTION
SCANNING ELECTRON MICROSCOPY
SUPERCONDUCTING WIRES
TIN ALLOYS
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSMISSION ELECTRON MICROSCOPY
WIRES