About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
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Advanced Manufacturing of High Temperature Ceramics and Composites: Processing, Characterization and Testing
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| Presentation Title |
Optimization and Considerations for the Fabrication of Highly Loaded Chopped Carbon Fiber Reinforced SiC Matrix Composites Through Direct Ink Writing and Silicon Melt Infiltration Processes |
| Author(s) |
Lilly Balderson, Georg Puchas, Stefan Schafföner, Tao Sun, Elizabeth Opila |
| On-Site Speaker (Planned) |
Lilly Balderson |
| Abstract Scope |
In recent advancements, a novel direct ink writing technique paired with reactive melt infiltration was refined from a design of experiments study where the statistical effects of polymer binder, polymer volume loading, carbon black content, and carbon fiber volume loading were evaluated. Notably, ideal formulation characteristics were compiled from rheology and the in-situ 4D-XCT monitoring of fiber inks for recommendations to procure print-stable, highly loaded fiber ink formulations. The established ink formulation exhibits high fiber stability with 5-15mm length chopped fibers in volume loadings of up to 60%. The lower baseline performance of the ink formulation with a 5 vol.% loading of chopped carbon fiber presented a density of 3.00 g/cm^3, residual silicon content of 18%, Young’s modulus of 374 GPa, and flexural strength of 250 MPa. The developmental observations in this study can be applied to other slurry-based processes for the fabrication of high fiber-loaded CMCs. |