About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Advanced Manufacturing of High Temperature Ceramics and Composites: Processing, Characterization and Testing
|
| Presentation Title |
Additive Manufacturing of Carbon Fiber Reinforced Ceramic Matrix Composites (C/C-SiC) |
| Author(s) |
Wolfgang Freudenberg, Jalena Best, Nico Langhof, Stefan Schafföner |
| On-Site Speaker (Planned) |
Stefan Schafföner |
| Abstract Scope |
Ceramic matrix composites (CMC) are conventionally fabricated by multi-stage processes, finishing with a final subtractive step. Additive manufacturing (AM) facilitates a net-shape manufacturing process. Furthermore, it is possible to place the fibers in load direction for an optimized performance. To fabricate C/C-SiC by AM, fused filament fabrication (FFF) with C-fibers < 250 µm and the micro-automated fiber placement (µAFP) technology with continuous fibers were used, embedded in a thermoplastic matrix. Therefore, filaments and fiber tapes with PEEK as an C-precursor were processed by AM in a first step to the CFRP. To prevent a re-melting of the as-printed CFRPs during pyrolysis at 1000 °C in N2 a prior crosslinking step was introduced. After the final liquid silicon infiltration (LSI), the bending strength up to 80 MPa with short fibers were determined. The effect of modifying the AM parameters and fiber orientation are significantly and will be correlated with the microstructure. |