|About this Abstract
||MS&T21: Materials Science & Technology
||Additive Manufacturing of High and Ultra-High Temperature Ceramics and Composites: Processing, Characterization and Testing
||High Temperature Properties of Polymer-derived Ceramic Matrix Composites Fabricated via Additive Manufacturing
||Tobias Schaedler, Kayleigh Porter, Phuong Bui, Ekaterina Stonkevitch, Mark O'Masta
|On-Site Speaker (Planned)
Silicon Carbide (SiC) is a sought after high temperature material, but 3D printing of SiC has been challenging. Conventional ceramic printing based on UV curing of acrylate resin slurries with a high volume fraction of particles is hindered by the high index of refraction and low UV transparency of SiC. Difficulties in sintering SiC complicate any 3D printing method that involves debinding and sintering of powders. Here, we demonstrate a novel approach to 3D printing SiC based on preceramic polymers. Carbosilanes are cured thermally or with UV light and subsequently pyrolyzed to an amorphous SiC phase that is crystallized to nano-grained beta SiC. Carbosilane based resins can be tailored for 3D printing and can be easily reinforced with particles or single-crystalline SiC micro-fibers to form ceramic matrix composites. The flexural strength is measured at temperatures up to 1600°C and compared to other 3D printed materials.
||Planned: Other (journal publication, etc.; describe below)