Modelling thermal conductivity of porous thermal barrier coatings

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DOI	Trouver le DOI : https://doi.org/10.3390/coatings9020101
Auteur	Rechercher : Ghai, Ramandeep Singh; Rechercher : Chen, Kuiying¹; Rechercher : Baddour, Natalie Identifiant ORCID : https://orcid.org/0000-0002-7025-7501
Affiliation	Conseil national de recherches Canada. Aérospatiale
Format	Texte, Article
Sujet	thermal barrier coatings; thermal conductivity; YSZ; porosity
Résumé	Thermal conductivity of porous thermal barrier coatings was evaluated using a newly developed five-phase model. It was demonstrated that porosities distributed in coating strongly affect thermal conductivity. The decisive reason for this change in thermal conductivity can be traced back to defect morphology and its orientation, depending on the coating deposition technique and process parameters used during deposition. In this paper, the Bruggeman’s two-phase model was used as a reference, and a five-phase model was developed to evaluate the thermal conductivity of porous coatings. This approach uses microstructural details of the shape, size, orientation and volumetric fraction of defects of coatings as input parameters. The proposed model can predict thermal conductivity values better than the previous two-phase model.
Date de publication	2019-02-07
Maison d’édition	MDPI
Licence	Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/deed.fr
Dans	Coatings 9, nº 2.
Langue	anglais
Publications évaluées par des pairs	Oui
Exporter la notice	Exporter en format RIS
Signaler une correction	Signaler une correction (s'ouvre dans un nouvel onglet)
Identificateur de l’enregistrement	2828ec90-57fd-4cb7-a558-25e9b5aef716
Enregistrement créé	2020-11-27
Enregistrement modifié	2020-12-15

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Date de modification :: 2026-03-09