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Environmental Barrier Coatings (EBCs) for Oxide/Oxide Composites

Schneider, Hartmut and Mechnich, Peter (2006) Environmental Barrier Coatings (EBCs) for Oxide/Oxide Composites. 11th International Conference on Modern Materials and Technologies (CIMTEC), 2006-06-08, Acireale (I).

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Abstract

Ceramic matrix composites (CMC) based on alumina and mullite are candidate engineering materials for long-term high-temperature applications in oxidative atmosphere if high damage tolerance and thermal shock resistance are required. However, alumina and mullite are prone to high-temperature chemical corrosion, mainly in water vapour enriched, high-speed flowing combustion atmosphere. The application of environmental barrier coatings (EBCs) is considered the only way to overcome the water-vapor corrosion problem of all-oxide CMCs. At DLR, the development of environmental barrier coatings for porous all-oxide CMCs is currently under way. The selection of EBC materials and of coating technologies is dependent from the specific CMC application. A focused issue of all developments is the prevention of coating disintegration by application of suitable bond-coats between oxide/oxide substrates and EBCs. Depending on potential applications environmental barrier coatings with different microstructures have been deposited on WHIPOX substrates by means of thermal spraying and by gas phase deposition techniques. A review of materials and coating technologies will be presented with special regard to the performance and durability of EBC-protected all-oxide CMCs in gas turbine combustors.

Item URL in elib:https://elib.dlr.de/46025/
Document Type:Conference or Workshop Item (Speech)
Title:Environmental Barrier Coatings (EBCs) for Oxide/Oxide Composites
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schneider, HartmutUNSPECIFIEDUNSPECIFIED
Mechnich, PeterUNSPECIFIEDUNSPECIFIED
Date:2006
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Keywords:Ceramic matrix composites,environmental barrier coatings,
Event Title:11th International Conference on Modern Materials and Technologies (CIMTEC)
Event Location:Acireale (I)
Event Type:international Conference
Event Dates:2006-06-08
Organizer:World Academy of Ceramics
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 - Combustion Chamber 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 Dec 2006
Last Modified:27 Apr 2009 13:18

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