| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
2024 Technical Division Student Poster Contest
|
| Presentation Title |
SPG-75: Simulations of the Effect of Temperature on Deformation Behavior of Small Metal Nanoparticles |
| Author(s) |
Claire Zhang, Ruikang Ding, Tevis D. B. Jacobs, Ashlie Martini |
| On-Site Speaker (Planned) |
Claire Zhang |
| Abstract Scope |
Deformation of bulk metallic materials is often facilitated by dislocations but, in nanoparticles with high surface area to volume ratio, surface diffusion becomes an increasingly important factor. The relative contributions of diffusion and dislocations to deformation, however, are difficult to disentangle as material properties and operating conditions can affect both diffusion and dislocation nucleation. Previous experiments have shown that these deformation mechanisms are nanoparticle size dependent, and the results supported a theory which also suggested temperature dependence. Here, we use classical molecular dynamics simulation to model compression of platinum nanoparticles at a range of temperatures to quantify and differentiate atomic surface diffusion and dislocation nucleation as a function of temperature. Results show that during compression of a platinum nanoparticle, a rise in temperature facilitates both dislocation nucleation and dislocation-independent facet formation through surface diffusion of atoms as contributors towards nanoparticle deformation.
|
| Proceedings Inclusion? |
Undecided |
| Keywords |
Computational Materials Science & Engineering, Characterization, Nanotechnology |