| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Next Generation Biomaterials
|
| Presentation Title |
Bioceramics Young Scholar: Novel Solution to Resolve Machine Default ‘Core-Shell’ Mode of Bioceramics Binderjetting: Validation in Microstructure and Mechanical Properties |
| Author(s) |
Srimanta Barui, Deepa Mishra, Gowtham NH, Bikramjit Basu |
| On-Site Speaker (Planned) |
Srimanta Barui |
| Abstract Scope |
During binderjetting of bioceramics, many commercial binderjet 3D printers dispense binder in a default ‘core-shell’ manner, where more binder is dispensed at the periphery (shell) and less binder at the ‘core’ of the structure. The inhomogeneous binding of the powder particles from the shell to the core significantly impacts the microstructure and biomechanical properties. To address this, we hypothesised ‘discretisation/segmentation’ of the cross-section of any given CAD file by slicing and discretising with an array of thin solid “segments” separated with an infinitesimal gap in a periodic manner. Here, the printing software commands the printhead to print each of the “segments” individually. The inter-segment and intra-segment binder “bleeding” among the segments results in a printed part with a homogeneously bound cross-section having no resultant “core-shell” effect. This hypothesis was experimentally validated by comparative microstructural analysis, improved density, and enhanced mechanical strength properties in binderjet printed 3 mol% yttria stabilised ZrO2. |