Nanomaterials: Mechanical Behavior and Applications
Event details
| Date | 18.05.2011 |
| Hour | 11:00 |
| Speaker | Dr. Katerina E. Aifantis, Aristotle University of Thessaloniki |
| Location |
MEB010
|
| Category | Conferences - Seminars |
The current talk will be divided into two portions related to the mechanical behavior of nanomaterials and their applications. In the first part a theoretical framework will be presented that can capture the micro-to-nano scale transition by explicitly accounting for the presence of interfaces and grain boundaries. This framework can successfully interpret the stress-strain response of micropillars and nanocrystals. Particularly, the stress-strain response during micropillar compression is characterized by multiple stress-strain bursts, while the unique feature of nanocrystal deformation is the inverse Hall-Petch size effects, by which the strength of the nanocrystal decreases as the grain size decreases. In the second part the electrochemical and mechanical stability of novel Sn-C nanocomposite anodes (for secondary Li-ion batteries) will be illustrated by presenting electron microscopy images taken throughout electrochemical cycling. These observations can provide design criteria which suggest that the size of the Sn nanocrystals must have a diameter below 20nm to allow for good capacity retentions.
Practical information
- General public
- Free