About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing of Ceramic-Based Materials: Process Development, Materials, Process Optimization and Applications
|
| Presentation Title |
Effect of Dispersants on the Direct Ink Write Printability of SiC Powder in Phenolic Resin for Sintered SiC |
| Author(s) |
Nadim S. Hmeidat, Jordan Wright, Chase Mortensen, Patrick Snarr, Brett G. Compton, Corson L. Cramer |
| On-Site Speaker (Planned) |
Nadim S. Hmeidat |
| Abstract Scope |
This work explores the use of Direct Ink Writing (DIW) to fabricate near-net-shape SiC parts for use in harsh environment engineering applications. The ink is phenolic resin based and acts as both a binder and carbon precursor, enabling high green strength and providing an in-situ sintering aid. The study focuses on the role of dispersants in improving the homogeneity and rheology of SiC-phenolic inks for reliable extrusion and shape retention. A range of dispersants were evaluated to identify rheological flowability and yield strength for optimization of ink parameters, including phenolic and phenoxyethanol (POE) ratio and SiC powder loading. Parts were printed to assess print quality, curing behavior, and warpage. After pyrolysis in nitrogen, the carbon residue from the phenolic phase aided in sintering of dense SiC at 2200 C. The optimized formulations demonstrated high print fidelity, sinterability, confirming the potential of this ink system for additive manufacturing (AM) of SiC. |