Abstract
In solid oxide fuels cell stacks, the Fe-Cr interconnector plates and their oxidation scale formed during operation must have sufficiently high electrical conductivity at the operating temperature. It is anticipated that this can be achieved by reaction-diffusion between Co3O4 and the chromia scale on Fe-Cr alloys. Coatings of Co3O4 were deposited on a Fe-22Cr alloy by plasma spraying and spray-painting. As-deposited samples were oxidised in air containing 1% H2O at 900C for various exposure time. During exposure the Fe-22Cr alloy forms an oxide scale, which reacts with the coating. The effects of inter-diffusion between the oxide scale and the Co3O4 coating were investigated with X-ray diffraction, scanning electron microscopy and energy-dispersive spectroscopy. The results obtained are discussed in relation to a calculated Cr-Co-oxide phase diagrams.
| Original language | English |
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| Title of host publication | Mass and charge transport in inorganic materials-II |
| Publisher | Techna Srl |
| Publication date | 2002 |
| Publication status | Published - 2002 |
| Event | Mass and charge transport in inorganic materials - Firenze Duration: 5 Nov 1829 → … |
Conference
| Conference | Mass and charge transport in inorganic materials |
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| City | Firenze |
| Period | 05/11/1829 → … |