| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Biological Materials Science
|
| Presentation Title |
Fabricating Bioinspired Helical and Bouligand Scaffolds using a Tri-axial Nested Helmholtz Coils-based Freeze-casting Setup |
| Author(s) |
Isaac Nelson, Paul Wadsworth, Max Mroz, Owen T Kingstedt, Jamie J Kruzic, Steven E Naleway |
| On-Site Speaker (Planned) |
Isaac Nelson |
| Abstract Scope |
Porous structures with tailored microstructures are critical to a variety of engineering and biological materials. Helical and Bouligand structures are of particular interest as they tend to have high mechanical toughness and provide impact resistance. Such structures are seen in a number of natural materials including the mantis shrimp clubs and grasshopper exoskeletons, where toughness is a critical property. To mimic these structures in porous scaffolds, we integrate the freeze-casting fabrication technique with a controllable uniform low (<10mT) magnetic field via a tri-axial nested Helmholtz coil. The freeze-casting fabrication technique uses the formation of ice crystals in a slurry to create pores. During the formation of ice crystals, the Helmholtz coils are controlled to apply a magnetic field in various helical and Bouligand patterns altering the direction of Fe3O4 particle alignment within the slurry. This alignment thereby alters the microstructure, enhancing the toughness and impact resistance of the resultant scaffolds. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |