| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Deformation Mechanisms, Microstructure Evolution, and Mechanical Properties of Nanoscale Materials
|
| Presentation Title |
G-8: Mechanical Properties of Nickel-Platinum Nanoparticles Fabricated by Solid-State Dewetting |
| Author(s) |
Mor Levi, Anuj Bisht, Eugen Rabkin |
| On-Site Speaker (Planned) |
Mor Levi |
| Abstract Scope |
We have studied the morphology and mechanical properties of Ni-Pt nanoparticles synthesized by solid-state dewetting of Ni-Pt bilayers deposited on a sapphire substrate. Such nanoparticles may be of interest for a number of catalysis-related applications. The size, shape, and spacing of the particles, as well as the degree of the long-range atomic order within them, were manipulated by varying annealing temperatures and times. We found that the morphology of the nanoparticles depends on composition: Increasing Pt content resulted in lower and wider nanoparticles, and in the change of their orientation with respect to the substrate. The in-situ micro-compression tests of the particles indicated that their strength decreases with increasing Pt content. We discussed this solid solution weakening trend, which is in contrast with the strengthening trend of bulk Ni-Pt solid solutions, in terms of nucleation-controlled plasticity. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Other, Characterization, Thin Films and Interfaces |