Oxidation Behavior and Outward Diffusion of Al Along Oxide Grain Boundaries of FeCrAl Alloys Overdoped with Zr and Hf

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dc.contributor.authorDaradkeh, Samer Issa Abdel Razzaqcs
dc.contributor.authorRecalde, Oscarcs
dc.contributor.authorMousa, Marwan Suleimancs
dc.contributor.authorSobola, Dinaracs
dc.contributor.authorBoll, Torbencs
dc.coverage.issue1cs
dc.coverage.volume101cs
dc.date.accessioned2025-06-19T08:56:18Z
dc.date.available2025-06-19T08:56:18Z
dc.date.issued2024-02-01cs
dc.description.abstractThe formation of the alpha-Al2O3 scale on reactive element (RE)-doped FeCrAl alloys is commonly believed to be primarily caused by inward oxygen transport along grain boundaries. However, this study suggests that metal ion outward diffusion also plays a role in the development of the oxide scales and their microstructural characteristics. The study examines the oxidation behavior and grain boundary outward diffusion of iron-chromium alloys containing similar to 10 at% aluminum and similar to 22 at% chromium, doped with an over-critical concentration of REs, i.e., Zr and Hf. All samples were investigated after thermal exposure at 1100 degrees C by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and atom probe tomography (APT). As a result of the overdoping, a considerable increase in oxide growth, an increase in the depth of internal oxidation, and RE-oxide formation near and at oxide grain boundaries (GBs) were observed as a consequence of increased inward and outward diffusion. The effect of overdoping manifests itself differently depending on the RE type and amount due to different solubility, ionic size, and electronic structure of alumina. The sample with Zr retained the adhesion of alumina to the alloy after the first and second thermal exposure, while Hf overdoping resulted in severe spallation after the second thermal exposure.en
dc.formattextcs
dc.format.extent41-59cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationHIGH TEMPERATURE CORROSION OF MATERIALS . 2024, vol. 101, issue 1, p. 41-59.en
dc.identifier.doi10.1007/s11085-023-10204-zcs
dc.identifier.issn2731-8397cs
dc.identifier.orcid0000-0002-0008-5265cs
dc.identifier.other187836cs
dc.identifier.researcheridG-1175-2019cs
dc.identifier.scopus57189064262cs
dc.identifier.urihttps://hdl.handle.net/11012/254262
dc.language.isoencs
dc.publisherSPRINGERcs
dc.relation.ispartofHIGH TEMPERATURE CORROSION OF MATERIALScs
dc.relation.urihttps://link.springer.com/article/10.1007/s11085-023-10204-zcs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/2731-8397/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectOverdopingen
dc.subjectReactive elementen
dc.subjectGrain boundaryen
dc.subjectAluminaen
dc.titleOxidation Behavior and Outward Diffusion of Al Along Oxide Grain Boundaries of FeCrAl Alloys Overdoped with Zr and Hfen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-187836en
sync.item.dbtypeVAVen
sync.item.insts2025.06.19 10:56:18en
sync.item.modts2025.06.19 10:33:16en
thesis.grantorVysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií. Ústav fyzikycs
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Pokročilé keramické materiálycs
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