| About this Abstract |
| Meeting |
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
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| Symposium
|
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
|
| Presentation Title |
Optimization of SiC Colloidal Ink for Direct-Write Additive Manufacturing via Dual-Polyelectrolyte Ratio Method |
| Author(s) |
Michael Adedamola Odunosho, James Smay |
| On-Site Speaker (Planned) |
Michael Adedamola Odunosho |
| Abstract Scope |
Robocasting is being extensively explored for fabrication of silicon carbide (SiC) components for a variety of applications. Many of the previous works have only been able to print low-to-moderate volume solid loadings (φ=0.33-0.44) and with larger nozzle sizes (600-1500μm) because high-solid loadings are difficult to extrude. However, printing low-moderate solid loadings and larger nozzles usually lead to poor surface finish and excessive shrinkage upon sintering of printed part. Therefore, optimizing SiC ink would be beneficial for printing high-solid loadings with smaller nozzles. In this study, a systematic approach towards the optimization of SiC by dual-polyelectrolyte ratio method was explored. A viscoelastic study revealed that lower concentration of flocculant is more suitable for SiC colloidal gel used in robocasting while higher flocculant concentration led to over-flocculation, thereby causing a transition from a strong gel initiated by bridging flocculation to a weak gel due to steric stabilization overcoming the bridging flocculation. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |