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Metal-organic Chemical Vapor Deposition of Environmental Barrier Coatings for All-Oxide Ceramic Matrix Composites

Tröster, Inga and Samoilenkow, Sergei and Wahl, Georg and Braue, Wolfgang and Mechnich, Peter and Schneider, Hartmut (2005) Metal-organic Chemical Vapor Deposition of Environmental Barrier Coatings for All-Oxide Ceramic Matrix Composites. In: Ceramic Engineering and Science Proceedings, 26 (2-8), pp. 173-179. The American Ceramic Society. 29th International Conference on Advanced Ceramics and Composites (ICACC), 2005-01-23 - 2005-01-28, Cocoa Beach, FL (USA). ISBN 1-57498-249-4

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Abstract

All-oxide ceramic matrix composites (CMCs) are promising candidates for structural components in key high-temperature applications, e. g. gas turbines and jet engines. Although inherently oxidation resistant, these materials are prone to corrosive attack by water vapor and other species in the combustion atmosphere. This drawback can be overcome by environmental barrier coatings (EBC) produced via metal-organic chemical vapor deposition (MOCVD), currently being under investigation at IOT. MOCVD is a convenient route to produce coatings at intermediate vacuum conditions with high deposition rates (up to 100 microns/h) and particularly advantageous for coating of complex shaped substrates. EBCs based on yttrium-aluminates are considered to exhibit high corrosion resistance in hot gas environment. WHIPOX-type CMCs provided by DLR were coated by MOCVD using yttrium- and aluminum-beta-diketonates. Prior to EBC deposition a bond coat was applied to substrate surfaces in order to assure good adhesion and uniform layer thickness. The coating thickness, crystallinity and morphology were characterized by x-ray diffraction and scanning electron microscopy.

Item URL in elib:https://elib.dlr.de/49940/
Document Type:Conference or Workshop Item (Paper)
Title:Metal-organic Chemical Vapor Deposition of Environmental Barrier Coatings for All-Oxide Ceramic Matrix Composites
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Tröster, IngaTU Braunschweig, Institut für OberflächentechnikUNSPECIFIED
Samoilenkow, SergeiTU Braunschweig, Institut für OberflächentechnikUNSPECIFIED
Wahl, GeorgBraunschweig, Institut für OberflächentechnikUNSPECIFIED
Braue, WolfgangUNSPECIFIEDUNSPECIFIED
Mechnich, PeterUNSPECIFIEDUNSPECIFIED
Schneider, HartmutUNSPECIFIEDUNSPECIFIED
Date:2005
Journal or Publication Title:Ceramic Engineering and Science Proceedings
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:26
Page Range:pp. 173-179
Publisher:The American Ceramic Society
ISBN:1-57498-249-4
Status:Published
Keywords:Metal-Organic Chemical Vapor Deposition, Ceramic Matrix Composites, Environmental Barrier Coatings
Event Title:29th International Conference on Advanced Ceramics and Composites (ICACC)
Event Location:Cocoa Beach, FL (USA)
Event Type:international Conference
Event Dates:2005-01-23 - 2005-01-28
Organizer:The American Ceramic Society
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:18 Jul 2007
Last Modified:27 Apr 2009 14:05

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