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Thermo-oxidative crosslinking of carbon fiber reinforced PEEK (Polyetheretherketone) for additive manufactured ceramic matrix composites

Title data

Freudenberg, Wolfgang ; Wich, Felix ; Best, Jalena ; Moukhina, Elena ; Scherzer, Tim ; Ruckdäschel, Holger ; Langhof, Nico ; Schafföner, Stefan:
Thermo-oxidative crosslinking of carbon fiber reinforced PEEK (Polyetheretherketone) for additive manufactured ceramic matrix composites.
In: Advanced Manufacturing : Polymer & Composites Science. Vol. 10 (2024) Issue 1 . - 2387422.
ISSN 2055-0359
DOI: https://doi.org/10.1080/20550340.2024.2387422

Project information

Project title:
Project's official title
Project's id
Entwicklung und Charakterisierung additiv gefertigter thermoplast-basierter kurz- und endlosfaserverstärkter C/C-SiC Verbundkeramiken
LA 4649/1-1

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

Carbon fiber reinforced polyetheretherketone (CF PEEK)1 samples were fabricated using material extrusion. These additive manufactured green bodies are later processed to their final application as ceramic matrix composites (CMC)² by the liquid silicon infiltration (LSI)³ route. Past studies revealed that the application of material extrusion for the fabrication of CMC requires an additional stabilization-step after 3D-printing in order to prevent the remelting of CF PEEK during the high temperature process of pyrolysis. The thermally induced crosslinking of the CF-PEEK parts ensured shape accuracy and avoided remelting during the pyrolysis afterwards but is limited by the melting temperature of PEEK (Tm ~ 343 °C). On the other hand, a certain temperature must be reached to initiate the reaction mechanism of the CF PEEK. Besides the final thermal annealing temperature, the crosslinking is also affected by time. Based on the analytical results from differential scanning calorimetry (DSC)4, a kinetic model was proposed in the temperature range of 315 °C – 335 °C, and an annealing time of 6 h – 48 h was deduced. Rheological and shape stability investigations of thermally annealed specimens verified the analytic results.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: carbon fiber reinforced polyetheretherketone; material extrusion; thermal crosslinking; differential scanning calorimetry; kinetics
Institutions of the University: Faculties > Faculty of Engineering Science > Chair Ceramic Materials > Chair Ceramic Materials - Univ.-Prof. Dr.-Ing. Stefan Schafföner
Faculties > Faculty of Engineering Science > Chair Polymer Materials > Chair Polymer Materials - Univ.-Prof. Dr.-Ing. Holger Ruckdäschel
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 17 Sep 2024 08:32
Last Modified: 17 Sep 2024 08:32
URI: https://eref.uni-bayreuth.de/id/eprint/90418