|About this Abstract
||MS&T21: Materials Science & Technology
||Additive Manufacturing of Ceramic-based Materials: Process Development, Materials, Process Optimization and Applications
||The Influence of Processing on the Mechanical Properties of Additively Manufactured Ceramic Matrix Composites
||Mark R. O?Masta, Ekaterina Stonkevitch, Kaleigh Porter, Phuong P. Bui, Natalie Larson, Zak Eckel, Tobias Schaedler
|On-Site Speaker (Planned)
||Mark R. O?Masta
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. Unresolved questions and opportunities in CMC processing will be highlighted.