Optimizing the Printability of ۳D Printed Alumina Parts Fabricated by Direct Ink Writing

This research investigates the printability of alumina pastes using the Direct Ink Writing (DIW) process. The print paste was prepared with different loadings of ۶۵, ۷۰, and ۷۵ wt% alumina powders and three different particle sizes of ۵, ۱۵, and ۳۰ μm. Two types of PVA binders were used, deionized water as a solvent, and other additives such as plasticizers and dispersants were incorporated in order to optimize the rheological properties of the paste. The alumina pastes after preparation were examined for their rheological properties when the raw materials were mixed. The pastes were then printed using an extrusion-based ۳D printer and then heat-treated at ۱۲۰۰°C to create the final ceramic parts. Microstructure properties were studied by scanning electron microscopy (SEM), density was measured by Archimedes method, and flexural strength was tested. Optimal composition of DIW-based fabrication was ۷۵ wt% alumina with particle size of ۱۵ μm.

کلیدواژه ها:

direct ink writing (DIW) ، Alumina ۳D printing ، Additive Manufacturing