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EB-PVD thermal barrier coatings, Part II: Lifetime assessment

Bartsch, Marion (2006) EB-PVD thermal barrier coatings, Part II: Lifetime assessment. In: Proceedings of the summer school of the European Research Training Network 'SICMAC' - HRPN-CT-2002-00203, pp. 201-214. Layered, Functional Gradient Ceramics and Thermal Barrier Coatings: Design, Fabrication, and Application; Summer School of the European Research Training Network 'SICMAC' - HRPN-CT-2002-00203, 2006-06-11 - 2006-06-16, Maó, Menorca, Spain.

Full text not available from this repository.

Abstract

Strategies for time economic lifetime assessment of thermal barrier coatings (TBC) in service are described and discussed on the basis of experimental results, achieved on material systems with coatings applied by electron beam physical vapour deposition. Service cycles for gas turbine blades have been simulated on specimens in thermo-mechanical fatigue tests, accelerating the fatigue processes by an increase of load frequency. Time dependent changes in the material system were imposed by a separate ageing, where the samples where pre-oxidized, before the fatigue test. Results of thermo-mechanical fatigue tests on pre-aged and as-coated specimens gave evidence of interaction between fatigue and ageing processes. An alternative approach is used, which is focused on the evolution of a failure relevant damage parameter in the TBC system. The interfacial fracture toughness was selected as a damage parameter, since one important failure mode of TBCs is the spallation near the interface between the metal and the ceramic. Fracture mechanical experiments based on indentation methods have been evaluated for monitoring the evolution of the interfacial fracture toughness as a function of ageing time. It was found that the test results were influenced by both changes of the interface (which is critical in service) and changes in the surrounding material.

Item URL in elib:https://elib.dlr.de/45943/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:EB-PVD thermal barrier coatings, Part II: Lifetime assessment
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Bartsch, MarionUNSPECIFIEDUNSPECIFIED
Date:11 June 2006
Journal or Publication Title:Proceedings of the summer school of the European Research Training Network 'SICMAC' - HRPN-CT-2002-00203
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 201-214
Editors:
EditorsEmail
European Commission, UNSPECIFIED
Status:Published
Keywords:Thermal Barrier Coatings, Testing, Lifetime Assessment, Fatigue, Thermally Grown Oxide
Event Title:Layered, Functional Gradient Ceramics and Thermal Barrier Coatings: Design, Fabrication, and Application; Summer School of the European Research Training Network 'SICMAC' - HRPN-CT-2002-00203
Event Location:Maó, Menorca, Spain
Event Type:international Conference
Event Dates:2006-06-11 - 2006-06-16
Organizer:European Commission, Prof. Marc Anglada, Universitat Politècnica de Catalunya, Barcelona, Spain
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Propulsion Systems (old)
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Virtual Engine and Validation Methods (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research
Deposited By: Bartsch, Dr.-Ing. Marion
Deposited On:08 Dec 2006
Last Modified:27 Apr 2009 13:17

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