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Meeting 2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
Symposium 2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
Presentation Title Effect of Filler Size on Porosity of Porous Parts Obtained via PBF-LB/P and Filler Dissolution
Author(s) Koichi Fujii, Takashi Kigure, Ryuichi Kobayashi, Yuki Yamauchi
On-Site Speaker (Planned) Koichi Fujii
Abstract Scope This study investigates the fabrication of porous parts using polyamide 12 (PA12) in a polymer-based powder bed fusion process with a laser beam (PBF-LB/P), where a powder containing a soluble filler is laser-sintered and subsequently subjected to filler dissolution. The porosity of the parts after dissolution could be controlled by varying the filler content. However, the porosity and filler content are typically not equivalent because pores may also result from insufficient powder flow, incomplete fusion, or partial dissolution during laser sintering. This study discusses the effect of filler size on powder properties and part porosity before dissolution. NaCl was mixed with polyamide 12 powder as a soluble filler for different particle sizes and contents. The mixed powder was laser sintered at various input energy levels. The results indicated that porosity increased as the NaCl particle size decreased, and this effect became more significant with higher NaCl content.
Proceedings Inclusion? Planned: Post-meeting proceedings

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