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Microstructure and oxidation behavior of Co–Cr–Ta ternary alloys

hal.structure.identifierDepartment of Nanoscience and Nanoengineering
hal.structure.identifierResearch Center for Structural Materials
dc.contributor.authorLOUIS ETIENNE, Moreau
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorGORSSE, Stéphane
hal.structure.identifierResearch Center for Structural Materials
hal.structure.identifierResearch and Services Division of Materials Data and Integrated System
dc.contributor.authorLAMBARD, Guillaume
hal.structure.identifierResearch Center for Structural Materials
hal.structure.identifierDepartment of Nanoscience and Nanoengineering
dc.contributor.authorHIDEYUKI, Murakami
dc.date.issued2023-03
dc.identifier.issn0925-8388
dc.description.abstractEnThe improvement of oxidation resistance of alloys is one of the key points to develop components for ultra-high temperature applications. The formation of a CrTaO4 oxide layer has attracted attention because of its thermal stability and good protection against oxidation above 1000 °C where more commonly used protective oxide layers such as Cr2O3 show their limits. This study investigates the microstructure evolution and oxidation resistance of the Co-Cr-Ta ternary alloys in comparison to the Calphad predictions. The Co-Cr-Ta samples tested here are composed of an FCC Co-rich phase and a C15 laves phase, and an increase of Cr content was linked to the formation and growth of an additional σ phase. Thermogravimetric analysis, together with the isothermal oxidation tests in air at 1200 °C proved that alloys exhibited good oxidation resistance formed a continuous CrTaO4 layer. Also, optimization of Co-Cr-Ta composition with improved oxidation resistance was attempted using data-driven strategy and the results demonstrated the potential of such approach for the future of alloy design.
dc.language.isoen
dc.publisherElsevier
dc.subject.enCharacterization
dc.subject.enPhase diagrams
dc.subject.enData-driven method
dc.subject.enCALPHAD method
dc.subject.enOxidation
dc.title.enMicrostructure and oxidation behavior of Co–Cr–Ta ternary alloys
dc.typeArticle de revue
dc.identifier.doi10.1016/j.jallcom.2022.167968
dc.subject.halChimie/Matériaux
bordeaux.journalJournal of Alloys and Compounds
bordeaux.page167968
bordeaux.volume936
bordeaux.peerReviewedoui
hal.identifierhal-04049513
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-04049513v1
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