ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
In recent years solid-oxide fuel cell (SOFC) interconnect components have proven to be akey-component accountable for the functionality of high temperature fuel cells. Amongst adequatethermal expansion and high temperature strength, highest oxidation resistance in anode and cathodegases under thermal cycling conditions is required in order to reach long term durability,particularly when using thin film light-weight components with particular focus on automotiveapplications. In order to match the challenging parameter profile Plansee developed themechanically alloyed ITM, a ferritic P/M Fe26Cr alloy strengthened with additions of Y2O3dispersoids, since it has been observed that apart from their HT strengthening effect, which is ofspecific interest for thin sheets components, finest ODS particles reduce the growth and enhance theadhesion of the forming oxide layers. The latter effect is of particular interest in applications wherealloys are exposed to HT cyclic conditions.In this work the nucleation phase of the oxide scale formation on P/M ODS Fe26Cr ITM iscompared to that on a reference ingot steel Fe22Cr in typical anode gases containing significantamounts of H2, CO and approximately 3% H2O as well as in laboratory air at 850°C. Thermalcycling oxidation tests following the COTEST standard up to 168h are carried out in bothenvironments. Moreover cyclic oxidation tests are performed in dry anode gas. Detailed studies ofoxide scale formation and evolution by means of electron microscopy of cross sections as well asoxide surfaces are undertaken
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/20/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.595-598.779.pdf
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