| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials Processing and Kinetic Phenomena: From Thin Films and Micro/Nano Systems to Advanced Manufacturing
|
| Presentation Title |
A Multitude of Fast Material Transport Paths in Solid State Dewetting of Thin Films |
| Author(s) |
Eugen Rabkin |
| On-Site Speaker (Planned) |
Eugen Rabkin |
| Abstract Scope |
The kinetics of solid state dewetting of thin metal films deposited on non-metal substrates is usually described in terms of surface self-diffusion. We demonstrate that other types of short-circuit diffusion provide an important contribution to the overall mass transport during dewetting and affect the film morphology and microstructure. We employed the method of markers to probe the role of metal self-diffusion along the Ni-sapphire interface during solid state dewetting of thin Ni films and demonstrated that interface diffusion is important during initial dewetting stages. We also determined the Arrhenius parameters of Au heterodiffusion along the Ni-sapphire interface in partially dewetted Ni films and demonstrated that in the hierarchy of short circuit diffusion paths the position of interface diffusion is between bulk and grain boundary diffusion. Finally, we demonstrated that combining capillary and chemical driving forces during dewetting accelerates the dewetting kinetics and results in record-high area density of dewetting holes. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Thin Films and Interfaces, |