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C/C-SiC Materials Based on High Performance C Fibres with Tailored Fibre-Matrix Bonding

Heidenreich, Bernhard and Jain, Neraj and Postler, Kevin and Koch, Dietmar and Schneck, Tanja, K. and Hermanutz, Frank and Clauß, Bernd and Buchmeiser, Michael, R. and Brück, Bastian and Schulz, Michael and Müller, Wolfgang and Horn, Siegfried, R. (2019) C/C-SiC Materials Based on High Performance C Fibres with Tailored Fibre-Matrix Bonding. 10th International Conference on High Temperature Ceramic Matrix Composites (HTCMC 10), 20.-22. Sept. 2019, Bordeaux, Frankreich.

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The Liquid Silicon Infiltration (LSI) process is used to manufacture carbon fiber based C/C-SiC composites. A CFRP-preform (carbon fibre reinforced polymer) is manufactured by infiltrating C fibre rovings with a phenolic resin, wet filament winding and warm pressing. After curing, the polymer matrix is converted to carbon by a high temperature treatment. Due to matrix shrinkage, the resulting C/C preform is characterized by a high amount of porosity. The pore morphology includes fine, closed pores as well as open porosity in form of segmentation microcracks (SMC), fragmenting the fibre tows into discrete C/C bundles and forming a 3D-network of interconnected microchannels. Depending on the fibre matrix bonding (FMB) and interaction, also shrinkage cracks between individual filaments and matrix (FMC) are observed in the C/C bundles all over the composite. During siliconization, the molten silicon is infiltrating the open pores and microcracks and SiC matrix is built up by a chemical reaction of Si and C. In order to obtain damage tolerant C/C-SiC materials, the fibres have to be protected from Si contact and conversion to SiC. Therefore, FMI has to be tailored to form dense C/C bundles and to avoid shrinkage cracks between filaments and matrix. In the current work, the formation of SMC and FMC is studied on CFRP-preforms based on standard high tenacity as well as on intermediate and ultrahigh modulus C fibres and is simulated in a FE-model. The influence of fibre surface treatment on FMB and microstructure development as well as on the material processing and, finally, on the mechanical properties of the resulting C/C-SiC materials is presented.

Item URL in elib:https://elib.dlr.de/132914/
Document Type:Conference or Workshop Item (Speech)
Title:C/C-SiC Materials Based on High Performance C Fibres with Tailored Fibre-Matrix Bonding
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Heidenreich, BernhardBernhard.Heidenreich (at) dlr.dehttps://orcid.org/0000-0002-4330-8844
Jain, Nerajjain.neraj (at) dlr.deUNSPECIFIED
Koch, DietmarDietmar.Koch (at) dlr.dehttps://orcid.org/0000-0003-4504-8721
Schneck, Tanja, K.Tanja.Schneck (at) ditf.deUNSPECIFIED
Hermanutz, Frankfrank.hermanutz (at) ditf.deUNSPECIFIED
Clauß, Berndbernd.clauss (at) ditf.deUNSPECIFIED
Buchmeiser, Michael, R.michael.buchmeiser (at) ipoc.uni-stuttgart.deUNSPECIFIED
Brück, Bastianbastian.brueck (at) physik.uni-augsburg.deUNSPECIFIED
Schulz, Michaelmichael.schulz (at) physik.uni-augsburg.deUNSPECIFIED
Müller, Wolfgangwolfgang.mueller (at) dlr.deUNSPECIFIED
Horn, Siegfried, R.horn (at) physik.uni-augsburg.deUNSPECIFIED
Date:September 2019
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:C/C-SiC, ceramic composite, carbon fibres
Event Title:10th International Conference on High Temperature Ceramic Matrix Composites (HTCMC 10)
Event Location:Bordeaux, Frankreich
Event Type:international Conference
Event Dates:20.-22. Sept. 2019
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transportation
DLR - Research area:Raumfahrt
DLR - Program:R RP - Space Transportation
DLR - Research theme (Project):R - Reusable Space Systems and Propulsion Technology
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design > Ceramic Composite Structures
Deposited By: Heidenreich, Bernhard
Deposited On:18 Dec 2019 11:30
Last Modified:18 Dec 2019 11:30

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