| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
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Additive Manufacturing of High and Ultra-high Temperature Ceramics and Composites: Processing, Characterization and Testing
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| Presentation Title |
Additive Manufacturing of Chopped Fiber Ultra-High Temperature Ceramic Composites |
| Author(s) |
James Wiiliam Kemp, Benjamin Lam, Connor Wyckoff, William Costakis, Lisa M. Rueschhoff |
| On-Site Speaker (Planned) |
Lisa M. Rueschhoff |
| Abstract Scope |
Ultra-high temperature ceramics (UHTC) and their composites (UHTCMCs) are of interest for use in harsh environments encountered by next-generation Air Force systems. Still, they are limited by their ability to be processed into complex-shaped components. A solution is through additive manufacturing (AM) via direct ink writing (DIW), which allows for the complex shaping of ceramics and composites. To create complex ceramic shapes, shear-thinning, visco-elastic tailored inks are developed with aqueous slurries and are extruded layer-by-layer. Two sets of inks were developed, one set with zirconium diboride (ZrB2), an UHTC, and another with silicon carbide (SiC). Both sets of inks were loaded with varying amounts of chopped carbon fibers (Cf) as a reinforcing phase. This study includes an analysis of the rheology and printability of inks, the effects of printing parameters on final ceramic development, Cf alignment along the deposition direction, and characterization of the densified samples via pressureless sintering. |