3D Bioplotter Research Papers

3D printed ceramics have received much attention of late due to the ability to manufacture complex near net shapes with a range of structures across multiple length scales. The introduction of hierarchical features offers a wider array of properties, yet with this comes additional unknowns as to their limits including the mechanisms behind failures. The present work applies in-situ Synchrotron micro X-ray computed tomography (μXCT) with 4-point flexural testing to study and further understand the failure pattern of 3D printed hierarchical porous ultra-high temperature ceramics. Samples were imaged at incremental load steps to observe the propagation of defects until final…

Bio-inspired multi-scaled (hierarchical) porous structures have remarkable strength and stiffness-to-density properties. Direct ink writing (DIW) or robocasting, an additive manufacturing (or also commonly known as 3D printing) material extrusion technique is able to create near-net-shaped complex geometries. A new approach of combining DIW, colloidal particle-stabilized emulsion paste inks and partial densification to create tailored architectures of hierarchical porosity on three scales has been demonstrated. The printed and sintered ceramic lattice structures possess relatively high overall porosity of 78.7% (on average), comprising mainly (64.7%) open porosity. The effects of formulation (surfactant and oil concentrations, solids particle size, and mixing speed) on…