|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Multi-material Additive Manufacturing: Processing and Materials Design
||Dynamic Microstructural Control in Printable Colloidal Structures via Acoustic Focusing
||Drew Melchert, Leanne Friedrich, Rachel Collino, Tyler Ray, Matthew Begley, Daniel Gianola
|On-Site Speaker (Planned)
Control of the microscale distribution of phases in composite printing inks allows tuning of structural and functional properties throughout a printed component. A promising method for dynamically ordering microstructure is acoustic focusing, in which microparticles suspended in a fluid are manipulated with pressure waves generated by piezoelectric actuation of the fluid in a microfluidic device. With this method we assemble and bind particles into structures with tunable microstructural features, which we then deposit onto a substrate as an ink to maintain compatibility with direct ink writing printing techniques. Confocal microscopy provides detailed 3D imaging of the assembled, printed structures, which we use to demarcate assembly regimes for structures with tunable porosity, particle size gradients, and anisotropic packing density. We demonstrate how control parameters (such as interparticle binding strength, acoustic pressure, and suspension flow rate) affect the assembly process and the resulting microstructural features of the assembled colloidal structure after printing.
||Planned: Supplemental Proceedings volume