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Meeting MS&T21: Materials Science & Technology
Symposium Journal of the American Ceramic Society Awards Symposium
Presentation Title Direct Ink Writing (DIW) of Hierarchical Porous Alumina Stabilized Emulsions: Rheology and Printability
Author(s) George V. Franks, Shareen S. L. Chan, Mitchell L. Sesso
On-Site Speaker (Planned) George V. Franks
Abstract Scope Multiscale porous ceramics are produced by Direct Ink Writing (DIW) (3D printing) alumina pastes. Millimeter scale porosity is created by the 3D printed filaments. 20 micron scale porosity is introduced within the scaffold filaments by adding oil to the aqueous suspension to create pores via particle stabilized emulsions or capillary suspensions. Micron scale porosity is developed by partial sintering. The printed and sintered alumina lattices possess high overall porosity (78.7%) and open porosity (64.7%). The effects of formulation (surfactant and oil concentrations, particle size, and mixing) on rheology and pore size and morphology are presented. The rheological properties (storage modulus, yield stress) of the emulsions have been found to delineate samples with good shape retention from those that slump. The internal features of the sintered structures have been analyzed via X-ray tomography and SEM. Additional more recent work on the ultra-high temperature ceramic, zirconium diboride will be presented as well.
Proceedings Inclusion? Undecided


A Novel Strategy to Strengthen Alumina-carbon Refractories for Flow Control of Molten Steel
A Thermodynamics-guided Framework to Design Spherical Lightweight Aggregate from Waste Coal Combustion Ash
Direct Ink Writing (DIW) of Hierarchical Porous Alumina Stabilized Emulsions: Rheology and Printability
Domain Walls in Ferroelectrics
Effect of Moisture on the Oxidation Behaviour of ZrB2.
In-Situ Resistance Degradation & Switching of Bulk YSZ & STO Single Crystals
Processing of MAX Phases: From Synthesis to Applications
Relaxor Characteristics and Electromechanical Response under High Field for Sodium BismuthTtitanate-based Ceramics

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