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In-situ impedance-spectroscopy measurements were performed at temperatures between 600 and 1,000 °C to investigate ionic transport in oxide scales formed on Kanthal AF alloy. The samples were pre-oxidized at 800, 900 and 1,000 °C in air. The impedance spectra of the oxide formed at 1,000 °C exhibited essentially one semicircle, whereas samples oxidized at lower temperatures showed an additional semicircle...
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