About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
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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 |
Anisotropic Microstructures in Platelet-Seeded Silicon Carbide obtained via Direct Ink Writing |
Author(s) |
Tess Marconie, Jeffrey P Youngblood, Rodney W. Trice |
On-Site Speaker (Planned) |
Rodney W. Trice |
Abstract Scope |
Silicon carbide (SiC) is a material of interest for many applications due to its mechanical properties, oxidation resistance, and high thermal conductivity. Colloidal processing and pressureless sintering can enable forming of complex shaped, dense SiC parts. Direct ink writing (DIW) is a colloidal processing technique where ceramic suspensions are extruded through a nozzle along a path, building up a part layer-by-layer. However, DIW is not only interesting for making complex shapes, but also for creating anisotropic microstructures by aligning particles via the forces in the print nozzle. In this work, SiC with anisotropic microstructure is created via the alignment of platelet seed particles in DIW and subsequent pressureless liquid phase sintering and annealing. The anisotropic microstructure and crystallographic texture of these materials will be explored with SEM, XRD, and EBSD. Mechanical properties of these ceramics will be explored via 4-pt flexural strength with Weibull analysis performed. |