About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Advances in Powder and Ceramic Materials Science
|
Presentation Title |
Processing & Mechanical Properties of Additively Manufactured Ceramic Matrix Composites Using Preceramic Polymers |
Author(s) |
Mark R. O'Masta, Ekaterina Stonkevitch, Kayleigh Porter, Phuong Bui, Zak Eckel, Tobias Schaedler |
On-Site Speaker (Planned) |
Mark R. O'Masta |
Abstract Scope |
Additive manufacturing (AM) of ceramic matrix composites (CMCs), comprising a polymer-derived Si(O)C ceramic matrix, allows for free-from part fabrication, with tailorable thermal and mechanical properties. Realizing these potential gains requires controlling multiple phase changes, as the silicon-based, pre-ceramic resin (PCR) is printed on light-based printers and converted into a CMC after a pyrolysis heat treatment, as well as understanding the interaction with the embedded reinforcement. Here, we pair numerical analysis with experimental studies, including in-situ X-ray computed tomography (XCT) of the pyrolysis event, to unveil the necessary conditions for converting the polymer to ceramic without the formation of deleterious cracks and voids. We test the influence of processing conditions on mechanical properties using printed ceramics reinforced with particles and whiskers [1]. Unresolved questions and opportunities in CMC processing will be highlighted.
[1] O’Masta, M.R., et al. J.Am.Ceram.Soc. 103, no.12 (2020): 6712–23. https://doi.org/10.1111/jace.17275 |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Ceramics, Mechanical Properties |