|About this Abstract
||MS&T22: Materials Science & Technology
||Manufacturing and Processing of Advanced Ceramic Materials
||Development of CeO2 Stabilized ZrO2 Inks for DIW
||Mia Kovac, Erin Koos, Jozef Vleugels, Annabel Braem
|On-Site Speaker (Planned)
Direct ink writing (DIW) is an additive manufacturing technique based on micro-extrusion of highly concentrated slurries through a narrow conical nozzle, which is deposited as a continuous spatially controlled filament in a layer wise fashion. To ensure easy flow through a nozzle and sufficient yield stress to support layer stacking DIW inks need to have shear-thinning flow and necessary viscoelastic properties.
As water-based hydrogel (Pluronic F-127) was used as a carrier for CeO2 stabilized ZrO2 ceramic powders because it allows fine adjustment of the rheology of suspension as well as obtaining stable inks. The effect of starting powder, dispersant and hydrogel content on the ink stability and viscoelastic behavior was studied. Based on laser diffraction, zeta potential and rheology analysis the optimum hydrogel and dispersant concentration needed to achieve maximum solid loading in extrusion inks have been studied.
||Planned: At-meeting proceedings