Effect of Component Thickness on Lifetime and Oxidation Rate of Chromia Forming Ferritic Steels in Low and High pO2-Environments
作者： P. Huczkowski , S. Ertl , J. Piron-Abellan , N. Christiansen , T. Höfler
DOI: 10.1179/MHT.2005.029
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摘要: AbstractLong term oxidation tests were carried out with a high-Cr ferritic steel at 800°C and 900°C in simulated cathode anode gas of solid oxide fuel cell (air an Ar/H2/H2O mixture respectively). It was found that decreasing sample thickness the life time decreases due to breakaway phenomena. This effect is caused by faster exhaustion chromium reservoir from bulk alloy case thinner components. During air exposure rates increase specimen this has be taken into account calculation Cr-reservoir exhaustion. dependence not during exposures gas. Hence, especially for thin walled components, are substantially smaller thus times longer than exposure. The differences behaviour two environments discussed on basis scale formation mechanisms involving microcrack formation...
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