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Development and Characterisation of Phenolic Resin based Liquid Silicon Infiltrated SiC/SiC Composites with SiNx Fibre Coating

Mainzer, Bernd and Frieß, Martin and Roder, Kristina and Nestler, Daisy and Wett, Daniel and Wöckel, Lydia and Ebert, Thomas and Wagner, Guntram and Spange, Stefan and Koch, Dietmar (2015) Development and Characterisation of Phenolic Resin based Liquid Silicon Infiltrated SiC/SiC Composites with SiNx Fibre Coating. In: Materials Science Forum, 825, pp. 224-231. Trans Tech Publications. 20. Symposium Verbundwerkstoffe und Werkstoffverbunde, 1.-3. Juli 2015, Wien. ISSN 0255-5476

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Abstract

SiC/SiC ceramics consist of silicon carbide fibres embedded in a silicon carbide matrix. As an alternative to classic CVI and PIP routes, Liquid Silicon Infiltration (LSI) was chosen as a technique with short process times to obtain composites with low porosity. Silicon carbide composites show good thermal shock resistance, a low coefficient of thermal expansion and excellent physical and chemical stability at elevated temperatures and are therefore regarded as promising candidates for various applications in jet engines and in power engineering. To build up the matrix, different phenolic resin based carbon precursors were infiltrated in fibre preforms and thermally cured, pyrolysed and siliconized. The aim is to obtain a high carbon yield during pyrolysis and to control the pore morphology in a way that the following liquid silicon infiltration leads to a complete reaction of the carbon matrix with silicon to SiC. The siliconization behaviour and conversion into SiC in dependence of pore morphology and chosen precursor is analysed. At the same time a functional fibre coating has to be developed which protects the fibres from liquid silicon and simultaneously provides a weak fibre matrix bonding. A LPCVD-SiNx fibre coating has been chosen and is investigated in fibre composites especially in terms of protection and reactivity in different atmospheres during pyrolysis and siliconization.

Item URL in elib:https://elib.dlr.de/100048/
Document Type:Conference or Workshop Item (Speech)
Title:Development and Characterisation of Phenolic Resin based Liquid Silicon Infiltrated SiC/SiC Composites with SiNx Fibre Coating
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Mainzer, Berndbernd.mainzer (at) dlr.deUNSPECIFIED
Frieß, Martinmartin.friess (at) dlr.deUNSPECIFIED
Roder, Kristinakristina.roder (at) mb.tu-chemnitz.deUNSPECIFIED
Nestler, Daisydaisy.nestler (at) mb.tu-chemnitz.deUNSPECIFIED
Wett, Danieldaniel.wett (at) mb.tu-chemnitz.deUNSPECIFIED
Wöckel, Lydialydia.woeckel (at) chemie.tu-chemnitz.deUNSPECIFIED
Ebert, Thomasthomas.ebert (at) chemie.tu-chemnitz.deUNSPECIFIED
Wagner, Guntramguntram.wagner (at) mb.tu-chemnitz.deUNSPECIFIED
Spange, Stefanstefan.spange (at) chemie.tu-chemnitz.deUNSPECIFIED
Koch, Dietmardietmar.koch (at) dlr.deUNSPECIFIED
Date:2015
Journal or Publication Title:Materials Science Forum
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:825
Page Range:pp. 224-231
Editors:
EditorsEmail
Edtmaier, Christianchristian.edtmaier@tuwien.ac.at
Requena, Guillermoguillermo.requena@tuwien.ac.at
Publisher:Trans Tech Publications
ISSN:0255-5476
Status:Published
Keywords:Ceramic Matrix Composites, SiC/SiC, Liquid Silicon Infiltration, Fibre Coating, Phenolic Resin
Event Title:20. Symposium Verbundwerkstoffe und Werkstoffverbunde
Event Location:Wien
Event Type:international Conference
Event Dates:1.-3. Juli 2015
Organizer:Deutsche Gesellschaft für Materialkunde
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Structures and Materials
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design > Ceramic Composite Structures
Deposited By: Mainzer, Bernd
Deposited On:13 Jan 2016 16:38
Last Modified:10 May 2016 23:36

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