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Life and FCT Failure of Yttria‑ and Ceria‑Stabilized EBPVD TBC Systems on Ni‑Base Substrates

Fritscher, Klaus (2019) Life and FCT Failure of Yttria‑ and Ceria‑Stabilized EBPVD TBC Systems on Ni‑Base Substrates. Oxidation of Metals, 91 (1-2), pp. 131-157. Springer. DOI: 10.1007/s11085-018-9870-5 ISSN 0030-770X

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Abstract

The lifetime at 1100 °C of furnace oxidation tested TBC samples having YSZ (ZrO2-7 wt.% Y2O3) and CeSZ (ZrO2-25 wt.% CeO2-2.5 wt.% Y2O3) topcoats on four Ni-base alloys including a no-bond coat NiCrAl alloy were studied. The thermally grown oxide (TGO) was investigated by energy-dispersive spectroscopy. The outer zone of the TGO revealed preferred enrichment of Zr and of rare earth elements Ce and Y in dependence of the stage of life. The oxygen potential gradients in the TGO have been rated; they are stronger for the YSZ TBC systems than for the CeSZ systems and cause a more intensive interaction of the outer zone alias mixed zone with the metal substrate than with the ceramic topcoat. When comparing the chemical composition data of the mixed zone as a function of the test period, the average lifetime as well as the particular composition of the two topcoats and the refractory element content of the substrates allowed conclusions to be drawn about the mechanisms which infuence the lifetime.

Item URL in elib:https://elib.dlr.de/121825/
Document Type:Article
Title:Life and FCT Failure of Yttria‑ and Ceria‑Stabilized EBPVD TBC Systems on Ni‑Base Substrates
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Fritscher, KlausUNSPECIFIEDUNSPECIFIED
Date:2019
Journal or Publication Title:Oxidation of Metals
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:91
DOI :10.1007/s11085-018-9870-5
Page Range:pp. 131-157
Publisher:Springer
ISSN:0030-770X
Status:Published
Keywords:Thermal Barrier Coating EB-PVD
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 - Turbine Technologies
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > High Temperature and Functional Coatings
Deposited By: Schulz, Prof. Dr Uwe
Deposited On:18 Oct 2018 10:45
Last Modified:06 Sep 2019 15:18

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