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Effect of TEBC on the Performance of Al2O3/Al2O3 Ceramic Matrix Composites

Mechnich, Peter and Alkan, Gözde and Flucht, Ferdinand (2023) Effect of TEBC on the Performance of Al2O3/Al2O3 Ceramic Matrix Composites. 47th International Conference on Advanced Ceramics and Composites, 2023-01-22 - 2023-01-27, Daytona Beach, USA.

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State-of-the art oxide-oxide ceramic matrix composites (CMC) based on Al2O3 fibers and porous Al2O3 matrices and are developed for various applications in harsh environments such as combustion atmospheres. Thermal-chemical degradation of such CMC includes fiber grain growth, matrix densification, fiber-matrix sintering, surface reactions with mineral dusts or molten salts, and hydroxylation/volatilization of Si- or Al-hydroxide species. Additionally, the relatively weak porous oxide matrices make CMC surfaces prone to surface erosion e.g. in high velocity gas flows or mechanical impact/abrasion. Low-thermal conductivity and environmentally stable protective oxide coatings promise effective thermal protection, improved chemical stability, reduced gas permeability, and erosion/abrasion resistance. As typical coating deposition processes are introducing additional thermal loads or surface chemical reactions, coatings may also significantly impact the CMC substrate. The effect of coatings on the overall performance of coated Al2O3-Al2O3 CMC materials is discussed on the examples of slurry-based, reaction-bonded Al2O3 and APS Y2O3 coatings.

Item URL in elib:https://elib.dlr.de/201673/
Document Type:Conference or Workshop Item (Speech)
Title:Effect of TEBC on the Performance of Al2O3/Al2O3 Ceramic Matrix Composites
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Mechnich, PeterUNSPECIFIEDhttps://orcid.org/0000-0003-4689-8197150708272
Date:24 January 2023
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Oxide CMC, Coatings
Event Title:47th International Conference on Advanced Ceramics and Composites
Event Location:Daytona Beach, USA
Event Type:international Conference
Event Start Date:22 January 2023
Event End Date:27 January 2023
Organizer:The American Ceramic Society
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Clean Propulsion
DLR - Research area:Aeronautics
DLR - Program:L CP - Clean Propulsion
DLR - Research theme (Project):L - Advanced Materials and New Manufacturing Technologies
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Structural and Functional ceramics
Deposited By: Mechnich, Dr.rer.nat. Peter
Deposited On:15 Jan 2024 09:53
Last Modified:24 Apr 2024 21:02

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