The influence of thermal cycling between room temperature and 77 K on the critical current of silver-sheathed YBaCuO and Bi(Pb)SrCaCuO superconducting composite wires and tapes was studied. The critical current was reduced by cycling when the strength of the oxide was low but not when it was high. T
Effect of non-uniform core thickness on critical current density of silver-sheathed oxide superconducting tapes
โ Scribed by S. Patel; T. Haugan; F. Wong; S. Chen; S.S. Li; J. Ye; D.T. Shaw
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- English
- Weight
- 943 KB
- Volume
- 35
- Category
- Article
- ISSN
- 0011-2275
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โฆ Synopsis
The fabrication of long silver-sheathed oxide superconducting tapes by the powder-intube technique tends to lead to non-uniformity in the core thickness during mechanical deformation and densification. This non-uniformity restricts current flow and reduces the critical current density. Using a simple model, the detrimental effects of various types of core thickness non-uniformity on the critical current density are investigated. Also the degree to which such non-uniformity needs to be controlled, based on the temperature of application of these conductors, is qualitatively inferred.
๐ SIMILAR VOLUMES
High T c Bi(Pb)-Sr-Ca-Cu-O core/silver sheath superconducting composite tapes with various volume fractions of oxide core (0.05-0.5) were prepared by the powder-in-tube method. The influence of the volume fraction of the oxide core on the strain endurance of the critical current density at 0 T at 77
The critical current density at 77 K at 0 T and the tensile strength at room temperature of high Tc Bi(Pb)-Sr-Ca-Cu-O and Y-Ba-Cu-O oxides in silver-sheathed tapes prepared by the powder-in-tube method were investigated. The main results can be summarized as follows. (1) The critical current density