About this Abstract |
| Meeting |
2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
|
| Symposium
|
2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
|
| Presentation Title |
Optimization of SiC Powder Packing through Bimodal Distribution and Mechanical Milling for Binder Jet Additive Manufacturing
|
| Author(s) |
Owen Paul Hernandez, Abigail Ortega, Carmen Rocha, Hector Alaniz, Francisco Medina |
| On-Site Speaker (Planned) |
Owen Paul Hernandez |
| Abstract Scope |
Silicon carbide (SiC) fabrication via Binder Jetting (BJT) is limited by low green and sintered densities, typically around 40%. This study proposes a bimodal particle size strategy to improve densification using coarse (60 µm) and fine (16 µm) SiC powders. The coarse powder is subjected to high-energy ball milling (24 h, 150 rpm, 10:1 ball-to-powder ratio) with 5 mm SiC media to refine particle morphology while minimizing contamination. Experimental trials investigate A:B weight ratios of 75:25, 50:50, and 25:75 to evaluate the effects of bimodal mixing and milling on packing efficiency. Samples are fabricated using a 50 µm layer thickness and 60% binder saturation ratio with a solvent-based binder to reduce green-part brittleness. Pressureless sintering is performed at 1600°C for 2 h, targeting densities between 50% and 60%. Characterization includes three-point flexural strength testing and density analysis using geometric measurements and Archimedes’ principle. |
| Proceedings Inclusion? |
Undecided |