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Development of polyvinylsilazane-derived ceramic matrix composites based on Tyranno SA3 fibers

Mainzer, Bernd and Frieß, Martin and Jemmali, Raouf and Koch, Dietmar (2016) Development of polyvinylsilazane-derived ceramic matrix composites based on Tyranno SA3 fibers. Journal of the Ceramic Society of Japan, 124 (10), pp. 1035-1041. Ceramic Society of Japan/Nippon Seramikkusu Kyokai. doi: http://dx.doi.org/10.2109/jcersj2.16107. ISSN 1882-0743.

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A damage tolerant weak matrix SiC fiber reinforced composite was developed by utilising a polyvinylsilazane in the polymer infiltration and pyrolysis (PIP) process. The polysilazane was infiltrated via resin transfer moulding in a layup of SA3 fabrics, thermally cured and pyrolyzed. This process was repeated until a residual open porosity of below 5% was reached. During pyrolysis the polyvinylsilazane converts to an amorphous SiCN matrix. In combination with the high modulus Tyranno SA3 SiC fibers a weak matrix composite is created. To protect the composite in oxidative environment at high temperatures, an exterior SiC coating by means of chemical vapour deposition was applied. The polyvinylsilazane was investigated in terms of differential scanning calorimetry and measurement of viscosity to find the ideal temperatures for the polymer infiltration step. Specimens of the precursor were cured and pyrolyzed. The densification during pyrolysis was investigated in terms of He gas pycnometry and X-ray diffraction. The composite was characterized by SEM, CT and mercury intrusion porosimetry. To determine the suitability of the SiC/SiCN composite for high temperature applications, samples were oxidized and tested by means of 3-point bending.

Item URL in elib:https://elib.dlr.de/108234/
Document Type:Article
Title:Development of polyvinylsilazane-derived ceramic matrix composites based on Tyranno SA3 fibers
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Mainzer, Berndbernd.mainzer (at) dlr.deUNSPECIFIED
Frieß, Martinmartin.friess (at) dlr.deUNSPECIFIED
Jemmali, Raoufraouf.jemmali (at) dlr.deUNSPECIFIED
Koch, Dietmardietmar.koch (at) dlr.deUNSPECIFIED
Journal or Publication Title:Journal of the Ceramic Society of Japan
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :http://dx.doi.org/10.2109/jcersj2.16107
Page Range:pp. 1035-1041
Publisher:Ceramic Society of Japan/Nippon Seramikkusu Kyokai
Keywords:SiC/SiCN SiC/SiC Ceramic matrix composites PIP Polysilazane
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 > Ceramic Composite Structures
Deposited By: Mainzer, Bernd
Deposited On:30 Nov 2016 12:04
Last Modified:08 Mar 2018 18:39

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