Ultrahigh Damping Capacities in Lightweight Structural Materials
| Autor: | Marc Widenmeyer, Tomče Runčevski, Achim M. Diem, Andrea Knöller, Robert E. Dinnebier, Zaklina Burghard, Stefan Kilper, Joachim Bill |
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| Rok vydání: | 2018 |
| Předmět: |
Battery (electricity)
Structural material Materials science Fabrication Mechanical Engineering Metamaterial Bioengineering Nanotechnology 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Damper Deformation mechanism visual_art visual_art.visual_art_medium General Materials Science Resilience (materials science) Ceramic 0210 nano-technology |
| Zdroj: | Nano Letters. 18:2519-2524 |
| ISSN: | 1530-6992 1530-6984 |
| DOI: | 10.1021/acs.nanolett.8b00194 |
| Popis: | The demand to outperform current technologies pushes scientists to develop novel strategies, which enable the fabrication of materials with exceptional properties. Along this line, lightweight structural materials are of great interest due to their versatile applicability as sensors, catalysts, battery electrodes, and acoustic or mechanical dampers. Here, we report a strategy to design ultralight (ρ = 3 mg/cm3) and hierarchically structured ceramic scaffolds of macroscopic size. Such scaffolds exhibit mechanical reversibility comparable to that of microscopic metamaterials, leading to a macroscopically remarkable dynamic mechanical performance. Upon mechanical loading, these scaffolds show a deformation mechanism similar to polyurethane foams, and this resilience yields ultrahigh damping capacities, tan δ, of up to 0.47. |
| Databáze: | OpenAIRE |
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