About this Abstract |
| Meeting |
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
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| Symposium
|
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
|
| Presentation Title |
Additive Manufacturing of Reaction-Bonded Silicon Carbide: Process Advancements |
| Author(s) |
Waut Declercq, Sebastian Meyers, Jozef Vleugels, Brecht Van Hooreweder |
| On-Site Speaker (Planned) |
Waut Declercq |
| Abstract Scope |
A promising additive manufacturing (AM) process for reaction-bonded silicon carbide (RBSC) is that of laser powder bed fusion (LPBF) combined with polymer infiltration and pyrolysis (PIP) and liquid silicon infiltration (LSI). The primary benefits of this AM process over conventional and alternative AM processes of silicon carbide (SiC) are its enhanced design complexity, fine resolution, near-net-shaping capability, and the absence of a thickness limitation. However, residual silicon and unreacted amorphous carbon persist in the final material, thereby limiting the thermal and mechanical properties. Two recent process advancements have been focused on reducing the amount of these undesired phases. Firstly, the optimization of LPBF through the use of spherical Si powder and the enlargement of the laser spot size have been demonstrated to increase the relative density after LPBF, while simultaneously improving the process productivity. Secondly, the phenolic resin preparation and curing have been investigated to yield homogeneous carbon characteristics, which better facilitate the reaction into SiC. |
| Proceedings Inclusion? |
Planned: Post-meeting proceedings |