elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Impressum | Datenschutz | Kontakt | English
Schriftgröße: [-] Text [+]

Environmental stability of the TBC system of a serviced EB-PVD coated high-pressure turbine blade

Braue, Wolfgang (2009) Environmental stability of the TBC system of a serviced EB-PVD coated high-pressure turbine blade. 8th Pcific Rim Conference on Ceramic and Glass Technology, 2009-05-31 - 2009-06-05, Hyatt Regency Hotel, Vancouver, BC/Canada.

Dieses Archiv kann nicht den Volltext zur Verfügung stellen.

Kurzfassung

Degradation of thermal barrier coatings via reactive hot corrosion products imposes a potential threat to the lifetime of engine hardware. This issue is addressed for a serviced EB-PVD coated 1st stage HPT airfoil which has experienced complete CaSO4 infiltration of the TBC layer prior to the deposition of CMAS-type hot corrosion deposits. The blade has been retained from service prior to spallation thus offering a fully intact YSZ TBC layer for this case study. The hot corrosion process has introduced several reactive interfaces with the TBC top coat and the TGO layer which were investigated by scanning electron microscopy (SEM) and focused-ion-beam (FIB) assisted analytical transmission electron microscopy ( TEM). Leaving aside minor elements effects the reactivity of the TBC system is primarily controlled by the high lime-to-silica ratio of the deposits. Upon partial dissolution of the TBC the CMAS/TBC interface typically consists of a CaZrO3 layer followed by fine-grained Ca-FSZ particles which envelop the formerly faceted, now rounded YSZ column tips. This reaction zone can be rationalized by phase compatibilities in the systems CaO-Y2O3-ZrO2 and CaO-ZrO2-SiO2 respectively. Possible terms for the formation of this unique CaSO4/CMAS microstructure are evaluated. Destabilization of the top coat is put into perspective with previous work on both, natural and synthetic CMAS deposits.

elib-URL des Eintrags:https://elib.dlr.de/60611/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Environmental stability of the TBC system of a serviced EB-PVD coated high-pressure turbine blade
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Braue, Wolfgangwolfgang.braue (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:2009
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Stichwörter:thermal barrier coatings, high-temperature corrosion, electron microscopy
Veranstaltungstitel:8th Pcific Rim Conference on Ceramic and Glass Technology
Veranstaltungsort:Hyatt Regency Hotel, Vancouver, BC/Canada
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:31 Mai 2009
Veranstaltungsende:5 Juni 2009
Veranstalter :The American Ceramic Society
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:L VU - Luftverkehr und Umwelt (alt)
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L VU - Luftverkehr und Umwelt
DLR - Teilgebiet (Projekt, Vorhaben):L - Leiser Luftverkehr (alt)
Standort: Köln-Porz
Institute & Einrichtungen:Institut für Werkstoff-Forschung > Keramische Struktur- und Funktionswerkstoffe
Hinterlegt von: Braue, Dr. Wolfgang
Hinterlegt am:05 Nov 2009 16:25
Letzte Änderung:24 Apr 2024 19:25

Nur für Mitarbeiter des Archivs: Kontrollseite des Eintrags

Blättern
Suchen
Hilfe & Kontakt
Informationen
electronic library verwendet EPrints 3.3.12
Gestaltung Webseite und Datenbank: Copyright © Deutsches Zentrum für Luft- und Raumfahrt (DLR). Alle Rechte vorbehalten.