Effects of cold rolling and thermal annealing on superconducting properties of 2212 Bi-Sr-Ca-Cu-O/Ag tapes
| Autor: | Thomas N. Blanton, C. L. Barnes, Mark Lelental, R.C. Bowen |
|---|---|
| Rok vydání: | 1993 |
| Předmět: |
Superconductivity
Materials science Annealing (metallurgy) Transition temperature Energy Engineering and Power Technology Sintering engineering.material Intergranular corrosion Condensed Matter Physics Microstructure Magnetic susceptibility Electronic Optical and Magnetic Materials Coating engineering Electrical and Electronic Engineering Composite material |
| Zdroj: | Physica C: Superconductivity. 217:79-84 |
| ISSN: | 0921-4534 |
| DOI: | 10.1016/0921-4534(93)90796-s |
| Popis: | High-temperature superconducting (HTS) tapes were fabricated by doctor-blade coating of a BSCCO 2212 dispersion in Butvar-B76 binder, and thermal processing in a three-zone belt furnace. The crystalline properties of these HTS layers were studied by X-ray diffraction techniques. The superconducting properties of HTS tape conductors were examined using AC susceptometry. The effects of sintering, cold rolling, and thermal annealing were monitored by following the temperature dependence of the AC susceptibility and process-induced changes in the crystalline microstructure. A significant degradation of the superconducting properties due to cold rolling has been observed. This degradation is attributed to inferior intergranular coupling and appears to be reversible. Thermal annealing of the cold-rolled samples leads to the full recovery of the AC susceptibility versus temperature response. |
| Databáze: | OpenAIRE |
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