|About this Abstract
||MS&T23: Materials Science & Technology
||Additive Manufacturing of Ceramic-based Materials: Process Development, Materials, Process Optimization and Applications
||Aqueous Slurry Development and Characterization for Multiple-Oxide Direct Ink Writing
||Patrick L. Snarr, Corson Cramer, Joseph J. Beaman, Andrew T. Nelson
|On-Site Speaker (Planned)
||Patrick L. Snarr
Direct Ink Writing (DIW) is an extrusion based additive manufacturing process capable of printing multi-oxide ceramic components. Multi-oxide DIW can potentially eliminate the need for assembly of multiple manufactured components and post processing steps such as application of coatings. However, mixing materials with different thermal properties may cause issues such as cracking upon sintering, which can adversely affect material properties. This study developed novel ZrO2 and Gd2O3 bearing aqueous slurries suitable for multi-oxide DIW. Slurry constituents such as solids content, dispersants, and viscosity modifiers were investigated to determine the impact on slurry rheology. After determining the optimal modifiers, each slurry had similar rheology, allowing for uniform printing. Shrinkage behavior of components produced with varying geometries were characterized in conjunction with the resulting microstructures. Ultimately, each DIW processing step was characterized to gain understanding of how a multi-oxide DIW system may behave.