| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Biological Materials Science
|
| Presentation Title |
Impact-resistant Biological Coatings on the Mantis Shrimp Dactyl Club |
| Author(s) |
Wei Huang, Nicolas Guarin-Zapata, Pablo Zavattieri, David Kisailus |
| On-Site Speaker (Planned) |
Wei Huang |
| Abstract Scope |
Biomineral composites found in natural organisms such as nacre, antler and the dactyl club of mantis shrimp show remarkable toughness and impact resistance. The impact speed of the dactyl clubs can reach ~20 m/s at an acceleration of ~10,000g during the daily feeding activities of mantis shrimp. The hydroxyapatite (HAP) nanoparticle based ultrathin (~ 70 µm) coatings found in the surface of these dactyl clubs plays an important role in terms of impact energy dissipation and damping. The surface consists of densely packed (~ 88 vol%) ~ 60 nm hydroxyapatite nanoparticles, which were found to consist of oriented attached ~10-20 nm HAP single crystals and organic phases. Particle rotation, translation and fracture, as well as the plastic deformation of organic phase, provides significant energy dissipation. Imperfections in the nanocrystals such as dislocations and amorphization are generated during the impact events, which are additional toughening mechanisms at the atomic scale. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |