Preparation of in situ MgB2/Fe superconducting tapes with highly densified core by hot pressing of electrically self-heated PIT wires
2009
Abstract Iron-sheathed in situ MgB 2 superconducting tapes with high densities were prepared by hot pressing of electrically self-heated powder-In-tube wires. The tapes were characterized for phase purity, density, microstructure and superconducting properties. It has been possible to achieve a core density of 2.45 g/cm 3 (93.2% of theoretical density) and 2.4-fold increase in critical current for the best sample. The method can be transformed into a hot rolling process for large-scale production of long MgB 2 conductors.
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