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3-dimensional microstructure characterization of porous ceramic matrix composites by X-ray tomography and FIB-slicing as database for numerical modelling

Bartsch, Marion and Artzt, Katia and Manero, Albert and Kenesei, Peter and Eggeler, Mario and Watermeyer, Philipp (2016) 3-dimensional microstructure characterization of porous ceramic matrix composites by X-ray tomography and FIB-slicing as database for numerical modelling. 91. DKG Jahrestagung, 07.-09. März 2016, Freiberg.

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Abstract

All-oxide ceramic composites (CMC) are developed for applications in combustion chambers of gas turbines as an alternative for metallic materials aiming at reduction of fuel consumption and NOx emission. At DLR a CMC is processed by winding an endless alumina fibre bundle, which is infiltrated by aqueous alumina slurry, on a mandrel and further sintering of the generated ceramic ‘green body’. The result is a CMC with complex hierarchical microstructure, which is controlled by the processing parameters. Fibre arrangement, fibre volume fraction, and matrix porosity can be varied in a wide range. For determining the effect of the complex microstructure on the resulting mechanical properties, numerical models are typically based on microstructural parameters derived from microscopic analyses of cross sections. A challenge is deriving correct 3-dimensional geometry data for the numerical model from such 2-dimensional images. A distinct improvement is provided by non-destructive X-ray tomography on the length scale from mm to µm and by combined sequential focused ion beam (FIB) ablation and scanning electron microscopy, which allows for construction of 3-dimensional microstructure features in the submicron range.

Item URL in elib:https://elib.dlr.de/108683/
Document Type:Conference or Workshop Item (Speech)
Title:3-dimensional microstructure characterization of porous ceramic matrix composites by X-ray tomography and FIB-slicing as database for numerical modelling
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Bartsch, Marionmarion.bartsch (at) dlr.dehttps://orcid.org/0000-0002-3952-2928
Artzt, Katiakatia.artzt (at) dlr.deUNSPECIFIED
Manero, Albertuniversity of central florida, orlando, fl, usaUNSPECIFIED
Kenesei, Peteradvanced photon source, argonne national laboratory, argonne, illinoisUNSPECIFIED
Eggeler, Mariomario.eggeler (at) dlr.deUNSPECIFIED
Watermeyer, Philippphilipp.watermeyer (at) dlr.deUNSPECIFIED
Date:8 March 2016
Refereed publication:Yes
Open Access:No
In DOAJ:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Ceramic Matrix Composite, CMC, Tomography, Microstructure, Modelling
Event Title:91. DKG Jahrestagung
Event Location:Freiberg
Event Type:international Conference
Event Dates:07.-09. März 2016
Organizer:DKG - Deutsche Keramische Gesellschaft
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 - Combustion Chamber Technologies
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Experimental and Numerical Methods
Deposited By: Bartsch, Dr.-Ing. Marion
Deposited On:01 Dec 2016 08:53
Last Modified:01 Dec 2016 14:33

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