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Thermoplastic Forming as an Alternative Shaping Process for Near-Net-Shape Production of C-SiSiC Ceramics via Liquid Silicon Infiltration (LSI) Process

Weber, Steffen and Sommer, Frank and Kern, Frank and Voggenreiter, Heinz and Koch, Dietmar (2014) Thermoplastic Forming as an Alternative Shaping Process for Near-Net-Shape Production of C-SiSiC Ceramics via Liquid Silicon Infiltration (LSI) Process. Journal of Ceramic Science and Technology, Vol.5 (No.3), pp. 223-236. Göller Verlag. DOI: 10.4416/JCST2014-00011 ISSN 2190-9385

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Official URL: http://www.ceramic-science.com

Abstract

The present study demonstrated the feasibility of producing carbon-based green bodies by means of extrusion, pyrolysis and subsequent conversion to C-SiSiC ceramics according to the LSI process.Athermoplastic binder system was used for the development of feedstocks that differ from conventional duroplastic binder systems as these would have created difficulties during processing owing to their curing behavior. Activated carbon, carbon fibers and semicoke were used as fillers and a source of a sufficiently stable carbon backbone in the carbonized intermediate. Special attentionwaspaid to the characterizationandquantification of material behavior at the water debinding step as well as at thermal treatment during pyrolysis. Porosity and microstructural characteristics of carbon bodies and subsequent C-SiSiC microstructure after Si-infiltration were investigated by means of scanning electron microscopy and porosity measurements.Thefeasibility of producing carbon-based extrusion feedstocks with high homogeneityandflowability which can be converted into SiC by means of LSI shows that the concept may be applied to production of near-netshape C-SiSiC components by means of thermoplastic injection molding

Item URL in elib:https://elib.dlr.de/91585/
Document Type:Article
Title:Thermoplastic Forming as an Alternative Shaping Process for Near-Net-Shape Production of C-SiSiC Ceramics via Liquid Silicon Infiltration (LSI) Process
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Weber, SteffenBT-KVSUNSPECIFIED
Sommer, Frankfrank.sommer (at) ifkb.uni-stuttgart.deUNSPECIFIED
Kern, Frankfrank.kern (at) ifkb.uni-stuttgart.deUNSPECIFIED
Voggenreiter, Heinzheinz.voggenreiter (at) dlr.deUNSPECIFIED
Koch, Dietmardietmar.koch (at) dlr.deUNSPECIFIED
Date:25 May 2014
Journal or Publication Title:Journal of Ceramic Science and Technology
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:Vol.5
DOI :10.4416/JCST2014-00011
Page Range:pp. 223-236
Editors:
EditorsEmail
Heinrich, J.G.Universität Clausthal
Publisher:Göller Verlag
ISSN:2190-9385
Status:Published
Keywords:Extrusion, injection molding, SiC, porosity, feedstock system
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion and Use (old)
HGF - Program Themes:other (old)
DLR - Research area:Energy
DLR - Program:E VG - Combustion and Gas Turbine Technologies
DLR - Research theme (Project):E - Materials for Energy Technology (old)
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design > Ceramic Composite Structures
Deposited By: Weber, Steffen
Deposited On:11 Nov 2014 14:48
Last Modified:31 Jul 2019 19:48

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