Analysis of void formation in Pt-rich γ-γ’ bond-coatings for TBC system application

Audigié, Pauline; Vande Put, Aurélie; Malard, Benoit; Malié, André; Monceau, Daniel

Publicación:
Analysis of void formation in Pt-rich γ-γ’ bond-coatings for TBC system application

dc.contributor.author	Audigié, Pauline
dc.contributor.author	Vande Put, Aurélie
dc.contributor.author	Malard, Benoit
dc.contributor.author	Malié, André
dc.contributor.author	Monceau, Daniel
dc.date.accessioned	2026-01-21T12:24:08Z
dc.date.available	2026-01-21T12:24:08Z
dc.date.issued	2025-02-21
dc.description	Highlights Voids form at the Pt-rich γ-γ’ coating/superalloy interface due to a Kirkendall effect. The pore spatial distribution moves over time at the rate of the Pt diffusion front. Voids grow by a vacancy coalescence phenomenon. Size increase of voids over time was demonstrated.
dc.description.abstract	Pt-rich γ-γ’ bond-coatings for thermal barrier coating systems may lead to detrimental pore formation. An extensive analysis of literature on voids nucleation and growth in the different metallic components of several kinds of TBC systems was performed. The study then focused on Pt-rich γ-γ’ bond-coating/Ni-based superalloy systems employing an original statistical analysis of voids formation and spatial distribution through secondary electron microscopy with focused ion beam sequential cross sectioning and synchrotron X-Ray tomography. It was found that pores at the Pt-rich γ-γ’ bond-coating/superalloy interface form due to the Kirkendall effect, with the highest concentration located at the Pt diffusion front.
dc.description.peerreviewed	Peerreview
dc.description.sponsorship	Financial support of SAFRAN Group
dc.identifier.citation	Corrosion Science 249: 112785
dc.identifier.doi	10.1016/j.corsci.2025.112785
dc.identifier.e-issn	1879-0496
dc.identifier.issn	0010-938X
dc.identifier.other	https://www.sciencedirect.com/science/article/abs/pii/S0010938X2500112X
dc.identifier.uri	https://hdl.handle.net/20.500.12666/1646
dc.language.iso	eng
dc.publisher	Elsevier
dc.rights.accessRights	info:eu-repo/semantics/restrictedAccess
dc.rights.license	© 2025 Elsevier Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies.
dc.title	Analysis of void formation in Pt-rich γ-γ’ bond-coatings for TBC system application
dc.type	info:eu-repo/semantics/article
dc.type.coar	http://purl.org/coar/resource_type/c_2df8fbb1
dc.type.hasVersion	info:eu-repo/semantics/publishedVersion
dspace.entity.type	Publication
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relation.isAuthorOfPublication.latestForDiscovery	686217e1-1771-46e8-a536-1fd94a7bdec8