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Crack morphology in a columnar thermal barrier coating System

Dennstedt, Anne and Guipont, Vincent and Maurel, Vincent and Gaslain, Fabrice and Bartsch, Marion (2018) Crack morphology in a columnar thermal barrier coating System. In: An ECI Conference Series Volume 18AT, p. 134. Thermal Barrier Coatings V, 24.-29. Juni 2018, Irsee, Deutschland. ISBN 978-1-5108-7239-4

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Abstract

For high temperature application, EB-PVD ceramic layers are commonly used as thermal barrier coating. During thermal transients, the thermal expansion mismatch between coating and substrate drives failure of the TBC mainly by interfacial cracking. Laser Shock Adhesion Test (LASAT) provides stresses at the ceramic/metal interface enabling controlled interfacial cracking [1-2]. For achieving a clear understanding of the influence of local morphology on interfacial toughness, this study aims at characterizing the 3D morphology of a crack at the interface between metal and an EB-PVD TBC having a columnar structure. Cracks were produced by LASAT. Surface infra red measurement yields to the localisation of the crack, that is detailed using cross-sectioning respectively. The crack tip was documented further in SE and BSE image stacks collected simultaneously during subsequent slice and view operations using a focus ion beam (FIB) and a scanning electron microscope (FIB slice & view). The segmented 3D data gives clear understanding of the columnar structure of the ceramic and of the interaction between the crack and the TBC microstructure.

Item URL in elib:https://elib.dlr.de/123616/
Document Type:Conference or Workshop Item (Poster)
Title:Crack morphology in a columnar thermal barrier coating System
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Dennstedt, AnneAnne.Dennstedt (at) dlr.deUNSPECIFIED
Guipont, VincentCentre des Materiaux, Mines Paris Tech, CNRS UMR 7633, PSL Research UniversityUNSPECIFIED
Maurel, VincentCentre des Materiaux, Mines Paris Tech, CNRS UMR 7633, PSL Research UniversityUNSPECIFIED
Gaslain, FabriceCentre des Materiaux, Mines Paris Tech, CNRS UMR 7633, PSL Research UniversityUNSPECIFIED
Bartsch, Marionmarion.bartsch (at) dlr.dehttps://orcid.org/0000-0002-3952-2928
Date:27 June 2018
Journal or Publication Title:An ECI Conference Series Volume 18AT
Refereed publication:Yes
Open Access:No
In DOAJ:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:p. 134
ISBN:978-1-5108-7239-4
Status:Published
Keywords:LASAT, FIB, EB-PVD, 3D morphology, crack tip
Event Title:Thermal Barrier Coatings V
Event Location:Irsee, Deutschland
Event Type:international Conference
Event Dates:24.-29. Juni 2018
Organizer:Engineering Conferences International (ECI)
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:propulsion systems
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Virtual Engine and Validation methods
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Experimental and Numerical Methods
Deposited By: Bartsch, Dr.-Ing. Marion
Deposited On:29 Nov 2018 09:55
Last Modified:29 Nov 2018 09:55

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