| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Emergent Materials under Extremes and Decisive In Situ Characterizations
|
| Presentation Title |
Nanomechanic Characterizations with Diamond-Anvil Cell Techniques |
| Author(s) |
Bin Chen, Xiaoling Zhou, Jianing Xu, Hongliang Dong, Yanju Wang, Zongqiang Feng, Xiaoxu Huang |
| On-Site Speaker (Planned) |
Bin Chen |
| Abstract Scope |
In recent years, we extended the explorations for the plastic deformation of nanomaterials by employing radial diamond-anvil cell XRD and TEM. We have successfully probed the lower grain size limit of dislocation activities. Our high-pressure studies reveal that dislocations are operative in nanoceramics. We have observed the reversal in the grain size dependence of grain rotation in nickel. It is detected that the strengthening of nickel nanocrystals can be extended down to 3 nm. Excitingly, we found that nanometals in a certain range of grain size exhibit both superplasticity and high strength. Compared with the traditional techniques, high pressure techniques are more advantageous in applying mechanical load to nanosized samples and characterizing the structural and mechanical properties in situ or ex situ, which could help unveil the mysteries of mechanics at the nanoscale and bridge the knowledge on the material mechanics at the multiscale. |