| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Stability in Extreme Environments
|
| Presentation Title |
The Morphological Stability and Non-equilibrium Growth of Passive Oxide Films |
| Author(s) |
Rohit Ramanathan, Peter W. Voorhees |
| On-Site Speaker (Planned) |
Peter W. Voorhees |
| Abstract Scope |
Understanding the kinetics of passive oxide formation and breakdown has been an ongoing problem for corrosion scientists for several decades. A model for the formation of a passive oxide film on a metal that is an extension of the Point Defect Model (PDM) will be presented. A linear stability analysis of the moving metal-oxide and oxide-solution interfaces shows that, depending on the parameters, the passive film may be unstable to morphological perturbations of the film interfaces, leading to nonplanar films and potentially the formation of a pit in the oxide. The non-equilibrium thermodynamics at stationary and moving oxide interfaces will also be discussed. We show that non-equilibrium cation concentrations are possible at a stationary oxide interface due to large fluxes of cations and vacancies through the interface. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Environmental Effects, Thin Films and Interfaces, |