Processing of thallium-based superconducting tapes for high current density
| Autor: | J.E. Tkaczyk, V. Selvamanickam, Pradeep Haldar, K.V. Salazaar, T. Finkle, Eric J. Peterson, E.P. Roth, K. Pfaffenbach |
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| Rok vydání: | 1996 |
| Předmět: |
Superconductivity
Materials science Energy Engineering and Power Technology chemistry.chemical_element Deformation (meteorology) Condensed Matter Physics Electronic Optical and Magnetic Materials chemistry Phase (matter) Thermomechanical processing Thallium Electrical and Electronic Engineering Current (fluid) Composite material Current density High current density |
| Zdroj: | Physica C: Superconductivity. 260:313-320 |
| ISSN: | 0921-4534 |
| DOI: | 10.1016/0921-4534(96)00143-8 |
| Popis: | Optimum thermomechanical processing conditions have been developed to achieve a high current density in powder-in-tube (PIT) thallium-based (Tl,Pb)-1223 and (Tl,Bi)-1223 tapes. Critical currents in excess of 25 A corresponding to a current density of 20 000 A/cm 2 have been achieved in these tapes at 77 K. Heat treatment and intermediate deformation sequences, heating rates, and starting precursor phase assemblages have been examined to optimize the current density. A combination of processing conditions that result in incremental densification, less microcracking and liquid formation in the early and final stages of thermomechanical treatment is found to result in the highest current densities. |
| Databáze: | OpenAIRE |
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