Influences of Ti and In additives on the growth and superconducting properties of Nb/sub 3/Sn fabricated by the tin-enrichment diffusion method
Nb/sub 3/Sn multifilamentary superconducting composites have been fabricated by internal diffusion which proceeds between Nb tube and high-tin-concentration Cu-Sn, Cu-Sn-Ti, Cu-Sn-In alloys. The influences of diffusion heat treatment process and Ti or In additives on the growth dynamics, structure and superconducting properties of Nb/sub 3/Sn layer have been studied. The results show that the growth rate of the Nb/sub 3/Sn layer is increased by adequate addition of a third element Ti or In to the matrix, and the effect of Ti is more obvious than that of In. T/sub c/ peak of Ti-added samples appears when the addition of Ti to the matrix is 0.4 w/o, and it is 0.3/sup 0/K higher than that of the non-Ti sample. H/sub c//sub 2/(O) of Ti-added samples monotonically rises along with the increment of Ti added to the matrix, and, when the addition of Ti is 0.76 w/o, H/sub c//sub 2/(O) of the sample is as high as about 29T, while that of the non-Ti sample is only about 21T. In 15T pulsed back-field, J/sub c/ (non Cu, 4.2/sup 0/K) of the Ti-added sample and In-added sample reach 6 x 10/sup 4/ A cm/sup -2/ and 2.5 x 10/sup 4/ A cm/sup -2/, respectively.
- Research Organization:
- Shanghai Institute of Metallurgy, Academia Sinica
- OSTI ID:
- 5114804
- Journal Information:
- Chin. Phys.; (United States), Vol. 6:3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
NIOBIUM BASE ALLOYS
SUPERCONDUCTIVITY
SUPERCONDUCTING COMPOSITES
FABRICATION
TIN ALLOYS
GROWTH
HEAT TREATMENTS
IMPURITIES
INDIUM ADDITIONS
TITANIUM ADDITIONS
ALLOYS
COMPOSITE MATERIALS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
INDIUM ALLOYS
MATERIALS
NIOBIUM ALLOYS
PHYSICAL PROPERTIES
TITANIUM ALLOYS
360101* - Metals & Alloys- Preparation & Fabrication
656102 - Solid State Physics- Superconductivity- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena- (-1987)