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EB-PVD thermal barrier coatings for gas turbines, Part I: Processing

Bartsch, Marion and Schulz, Uwe and Saruhan, Bilge (2006) EB-PVD thermal barrier coatings for gas turbines, Part I: Processing. In: Proceeding of the Summer School of the European Research Training Network SICMAC - HRPN-CT-2002-00203, pp. 191-200. Layered, functional gradient ceramics, and thermal barrier coatings: design, fabrication, and applications, 2006-06-11 - 2006-06-16, Maó, Menorca, Spain.

Full text not available from this repository.

Abstract

Partially stabilized zirconia (PYSZ) based thermal barrier coatings (TBC) manufactured by EB-PVD process are a crucial part of a system, which protects the turbine blades situated at the high pressure sector of aero engines and stationary gas turbines under severe service conditions. These materials show a high strain tolerance relying on their unique coating morphology, which is represented by weakly bonded columns. The porosity present in ceramic top coats affects the thermal conductivity by reducing the cross sectional area through which the heat flows. The increase in thermal conductivity after heat-treatment relates to the alteration of the shape of the pores rather than the reduction of their surface-area at the cross section. The studies carried out by the authors demonstrate that the variation of the parameters during the EB-PVD processing of PYSZ based top-coats alters the columnar morphology of the coatings. Consequently, these morphological changes affect primarily the thermal conductivity and eventually the Young’ Modulus which are the key physical properties of this material group. New ceramic compositions covering zirconia coatings stabilized with alternative oxides, pyrochlores and hexaluminates are addressed. Failures occurring in ceramic top coats mark the lifetime of TBC system and therefore, it is necessary that their performance should go beyond that of the-state-of-the-art materials. This context summarizes the research and developments devoted to future generation ceramic top coats of EB-PVD TBCs.

Item URL in elib:https://elib.dlr.de/45938/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:EB-PVD thermal barrier coatings for gas turbines, Part I: Processing
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Bartsch, MarionUNSPECIFIEDUNSPECIFIED
Schulz, UweUNSPECIFIEDUNSPECIFIED
Saruhan, BilgeUNSPECIFIEDUNSPECIFIED
Date:11 June 2006
Journal or Publication Title:Proceeding 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. 191-200
Editors:
EditorsEmail
European Commission, UNSPECIFIED
Status:Published
Keywords:Thermal Barrier Coating, Processing
Event Title:Layered, functional gradient ceramics, and thermal barrier coatings: design, fabrication, and applications
Event Location:Maó, Menorca, Spain
Event Type:international Conference
Event Dates:2006-06-11 - 2006-06-16
Organizer:European Commission, Prof. Marc Anglada, Universitat Politécnicade 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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