Duke Physics Colloquium: Additive Manufacturing and Architected Materials

"Additive Manufacturing and Architected Materials" - Material properties are governed by the chemical composition and spatial arrangement of constituent elements at multiple length scales. This fundamentally limits material properties with respect to each other creating trade-offs when selecting materials for specific applications. For example, strength and density are inherently linked so that, in general, the more dense the material, the stronger it is in bulk form. We are combining advanced microstructural design, using flexure and screw theory as well as topology optimization, with advanced additive micro- and nanomanufacturing techniques to create new material systems with previously unachievable property combinations. We have demonstrated designer properties resulting from architected materials in polymers, metals, ceramics and combinations thereof. Our manufacturing techniques include Projection Microstereolithography (P¿SL), Direct Ink Writing (DIW), and Electrophoretic Deposition (EPD). These tools are capable of generating the designed structures which are highly three-dimensional micro- and nano-scale architectures with multiple constituent materials in the same structure. Design of materials, fabrication, and characterization will all be discussed. Faculty Host: Glenn Edwards. Refreshments served before and after the event in room 128.