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Three-Dimensional Investigation of the Pore Space in Carbon Preforms of Metal Infiltrated Carbon Based Silicon Carbide Ceramics

Jemmali, Raouf and Weber, Steffen and Koch, Dietmar (2017) Three-Dimensional Investigation of the Pore Space in Carbon Preforms of Metal Infiltrated Carbon Based Silicon Carbide Ceramics. ZfP-Zeitung (156), pp. 46-51. Deutsche Gesellschaft für Zerstörungsfreie Prüfung (DGZfP). ISSN 1616-069X.

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Official URL: https://www.dgzfp.de/Portals/24/Zeitung/Ausgaben/Zeitung156.pdf

Abstract

The microstructures of MiCaSiC ® ceramics (Metal Infiltrated Carbon based Silicon Carbide) depend among others on the pore space properties of the carbon preforms before the liquid silicon infiltration (LSI). The aim of this work was to obtain three-dimensional information of the complex and non-homogeneous pore network in the carbon preform using microfocus X-ray computed tomography (μCT) and adequate image processing algorithms. It was found that it is possible to identify the optimum silicon infiltration direction by analyzing the porosity profiles. The pore size distribution was derived from the tomographic images using granulometry and cells reconstruction methods. Both results were compared with the distribution provided experimentally by the mercury intrusion porosimetry (MIP). Some relevant structural parameters (e.g. geometrical tortuosity, surface density, etc.) were calculated from the tomograms. A representative unit cell (RUC) was derived on the basis of those values. This information will reduce the computational efforts when performing μCT data based simulations, in order to better understand the LSI process for MiCaSiC®.

Item URL in elib:https://elib.dlr.de/114651/
Document Type:Article
Title:Three-Dimensional Investigation of the Pore Space in Carbon Preforms of Metal Infiltrated Carbon Based Silicon Carbide Ceramics
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Jemmali, Raoufraouf.jemmali (at) dlr.deUNSPECIFIED
Weber, SteffenUNSPECIFIEDUNSPECIFIED
Koch, Dietmardietmar.koch (at) dlr.deUNSPECIFIED
Date:October 2017
Journal or Publication Title:ZfP-Zeitung
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 46-51
Publisher:Deutsche Gesellschaft für Zerstörungsfreie Prüfung (DGZfP)
ISSN:1616-069X
Status:Published
Keywords:MiCaSiC®, Silicon carbide (SiC), microfocus X-ray computed tomography (μCT); liquid silicon infiltration (LSI); ceramics; pore size distribution; representative unit cell (RUC)
HGF - Research field:Energy
HGF - Program:Energy Efficiency, Materials and Resources
HGF - Program Themes:Methods and Concepts for Materials Development
DLR - Research area:Energy
DLR - Program:E VS - Combustion Systems
DLR - Research theme (Project):E - Materials for Energy Technologies (old)
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design
Deposited By: Jemmali, Raouf
Deposited On:11 Dec 2017 11:47
Last Modified:31 Jul 2019 20:12

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