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ZrO2 Environmental Barrier Coatings for Oxide/Oxide Ceramic Matrix Composites fabricated by Electron-Beam Physical Vapor Depostion

Mechnich, Peter and Braue, Wolfgang (2010) ZrO2 Environmental Barrier Coatings for Oxide/Oxide Ceramic Matrix Composites fabricated by Electron-Beam Physical Vapor Depostion. In: Design, Development, and Applications of Engineering Ceramics and Composite Systems Ceramic Transactions, 215. John Wiley. pp. 285-293. ISBN 978 0 470 88936 7.

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Abstract

Oxide/oxide ceramic matrix composites were coated with Y-stabilized ZrO2 (YSZ) by electron-beam physical vapor deposition (EB-PVD). The typical columnar coating morphology is strongly influenced by CMC surface characteristics. The application of thin ceramic bondcoats provides a more homogeneous microstructure and less intercolumnar separation upon heat treatment. A serious hot-corrosion problem caused by airborne inorganic particles may arise for EBC-coated CMCs in service. The interaction of EBC-coated CMCs and CMAS-type inorganic deposits was studied in laboratory-scale experiments. It turns out that melting and subsequent penetration of CMAS-type deposits is highly critical for the CMC structural integrity, in particular near the coating/CMC interface. Moreover, the presence of iron oxide gives rise to severe YSZ recession via formation of an intermediate calcia-zirconia kimzeyite-type garnet.

Item URL in elib:https://elib.dlr.de/63946/
Document Type:Contribution to a Collection
Title:ZrO2 Environmental Barrier Coatings for Oxide/Oxide Ceramic Matrix Composites fabricated by Electron-Beam Physical Vapor Depostion
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Mechnich, PeterWF-KSUNSPECIFIED
Braue, WolfgangWF-KSUNSPECIFIED
Date:2010
Journal or Publication Title:Design, Development, and Applications of Engineering Ceramics and Composite Systems
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:Yes
Volume:215
Page Range:pp. 285-293
Editors:
EditorsEmail
Singh, D.UNSPECIFIED
Zhu, D.UNSPECIFIED
Zhou, Y.UNSPECIFIED
Singh, M.UNSPECIFIED
Publisher:John Wiley
Series Name:Ceramic Transactions
ISBN:978 0 470 88936 7
Status:Published
Keywords:YSZ, EB-PVD, CMC, Corrosion
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 - Turbine Technologies (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Structural and Functional Ceramics
Deposited By: Mechnich, Dr.rer.nat. Peter
Deposited On:06 Sep 2010 16:33
Last Modified:06 Sep 2010 16:33

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