About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
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High Temperature Oxidation of Metals and Ceramics
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Presentation Title |
Study of the Pre-oxidation Effect on Long-term Oxidation Properties of Porous Fe22Cr Alloy |
Author(s) |
Damian Koszelow, Sebastian Molin, Agnieszka Drewniak, Piotr Jasiński |
On-Site Speaker (Planned) |
Damian Koszelow |
Abstract Scope |
Recently, ferritic porous alloys have been employed in gas membranes, sensor systems, or as mechanical supports in solid oxide cells (SOCs). They are an alternative material to ceramic components allowing a decreased price of the devices. The disadvantage of using porous alloys is their high-temperature (>500 °C) oxidation. The formation of the oxide scale leads to a decrease of porosity, breakaway oxidation, and failure of the component.
In this work, we evaluated the effect of the initial pre-oxidation step (carried out at elevated temperature: 900 - 950 °C) on the long-term oxidation properties at working temperature (at 700 °C). The materials studied are porous (~30 % total porosity) Fe22Cr alloys. The lifespan of the "untreated" and pre-oxidized alloy was established and compared using the simple prediction model. We will present the obtained results and discuss the predicted lifetime of porous steel components in the context of high-temperature applications. |