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Development of wound SiCBNx/SiNx/SiC with near stoichiometric SiC matrix via LSI process

Mainzer, Bernd and Roder, Kristina and Wöckel, Lydia and Frieß, Martin and Koch, Dietmar and Nestler, Daisy and Wett, Daniel and Podlesak, Harry and Wagner, Guntram and Ebert, Thomas and Spange, Stefan (2016) Development of wound SiCBNx/SiNx/SiC with near stoichiometric SiC matrix via LSI process. Journal of the European Ceramic Society, 36 (7), pp. 1571-1580. Elsevier. doi: http://dx.doi.org/10.1016/j.jeurceramsoc.2015.12.015. ISSN 0955-2219.

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In order to develop SiC/SiC ceramic matrix composites with a low porosity, liquid silicon infiltration(LSI) was chosen as a technique, characterized by short processing times. To create the matrix, a tailoredphenolic resin containing ß-naphthol units was synthesized and infiltrated in wound fiber preforms,thermally cured, pyrolysed and siliconized. The aim is to obtain a high carbon yield during pyrolysis andto create a dense carbon foam between the SiC fibers. Instead of a classic liquid silicon infiltration viacapillary forces through a carbon block-like microstructure, this foam promotes a softer infiltration withless fiber degradation and a maximized carbon conversion to near stoichiometric SiC. To protect the SiCfibers from an attack of the liquid silicon and to simultaneously provide a weak fiber matrix bonding, aBNx/SiNxfiber coating was chosen. The coating was applied by means of low-pressure chemical vapordeposition (LPCVD) using gaseous chlorine free precursors.

Item URL in elib:https://elib.dlr.de/108231/
Document Type:Article
Title:Development of wound SiCBNx/SiNx/SiC with near stoichiometric SiC matrix via LSI process
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Mainzer, Berndbernd.mainzer (at) dlr.deUNSPECIFIED
Roder, Kristinakristina.roder (at) mb.tu-chemnitz.deUNSPECIFIED
Wöckel, Lydialydia.woeckel (at) chemie.tu-chemnitz.deUNSPECIFIED
Frieß, Martinmartin.friess (at) dlr.deUNSPECIFIED
Koch, Dietmardietmar.koch (at) dlr.deUNSPECIFIED
Nestler, Daisydaisy.nestler (at) mb.tu-chemnitz.deUNSPECIFIED
Wett, Danieldaniel.wett (at) mb.tu-chemnitz.deUNSPECIFIED
Podlesak, Harryharry.podlesak (at) mb.tu-chemnitz.deUNSPECIFIED
Wagner, Guntramguntram.wagner (at) mb.tu-chemnitz.deUNSPECIFIED
Ebert, Thomasthomas.ebert (at) chemie.tu-chemnitz.deUNSPECIFIED
Spange, Stefanstefan.spange (at) chemie.tu-chemnitz.deUNSPECIFIED
Journal or Publication Title:Journal of the European Ceramic Society
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :http://dx.doi.org/10.1016/j.jeurceramsoc.2015.12.015
Page Range:pp. 1571-1580
Series Name:Journal of the European Ceramic Society
Keywords:Ceramic matrix composites SiC/SiC LPCVD Phenolic resin beta-Naphthol
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 (old)
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design
Deposited By: Mainzer, Bernd
Deposited On:01 Dec 2016 11:13
Last Modified:01 Dec 2016 11:13

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