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Manufacture and Mechanical Properties of C/C-SiC Sandwich Structures

Heidenreich, Bernhard and Kraft, Harald and Bamsey, Nathan and Shi, Yuan and Such-Taboada, Miguel and Koch, Dietmar (2019) Manufacture and Mechanical Properties of C/C-SiC Sandwich Structures. 10th International Conference on High Temperature Ceramic Matrix Composites (HTCMC 10), 20.-22. Sept. 2019, Bordeaux, Frankreich.

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C/C-SiC sandwich structures have been developed using liquid silicon infiltration (LSI) process and in situ joining method. They offer high specific stiffness and strength, low thermal expansion, high environmental stability and temperature resistance. Potential application areas are geometrically stable satellite structures like optical benches or high temperature structures for thermal protection systems or control surfaces in spacecraft. In this study, sandwich structures were manufactured using prepregs based on 2D carbon fibre fabrics and a phenolic resin precursor. CFRP preforms for the different types of cores and the skin panels were manufactured using warm pressing and autoclave technique. In the second step, the sandwich components were pyrolysed separately, leading to C/C preforms. For the build-up of the sandwich structure, two skin plates were joined to the core structure and subsequently, the resulting C/C sandwich structure was siliconized. Thereby, molten Si was infiltrated in the porous C/C and joining paste and the SiC matrix was built up by a chemical reaction of Si and C. The resulting C/C-SiC sandwich structures were characterized in bending, out of plane compression and shear. The effective flexural, compression and shear stiffness of the sandwich structures were determined and compared to the results obtained by analytical and Finite Element simulation.

Item URL in elib:https://elib.dlr.de/132918/
Document Type:Conference or Workshop Item (Speech)
Title:Manufacture and Mechanical Properties of C/C-SiC Sandwich Structures
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Heidenreich, BernhardBernhard.Heidenreich (at) dlr.dehttps://orcid.org/0000-0002-4330-8844
Kraft, HaraldHarald.Kraft (at) dlr.deUNSPECIFIED
Shi, Yuanyuan.shi (at) dlr.dehttps://orcid.org/0000-0002-4210-9069
Koch, DietmarDietmar.Koch (at) dlr.dehttps://orcid.org/0000-0003-4504-8721
Date:December 2019
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:ceramic matrix composite; sandwich structure; C/C-SiC; manufacture; joining; characterization
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 11:31
Last Modified:18 Dec 2019 11:31

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