Dresden 2014 – scientific programme
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DY: Fachverband Dynamik und Statistische Physik
DY 40: Poster - Quantum Systems/ Stat. Phys./ Diffusive Process
DY 40.32: Poster
Thursday, April 3, 2014, 17:00–19:00, P3
Phase field modelling of oxide scale growth — •Fabian Twiste1, Claas Hüter1, Robert Spatschek1, Jörg Neugebauer1, and Michael Finnis2 — 1Max-Planck Institut für Eisenforschung, Düsseldorf — 2Imperial College, London
We present recent steps towards a phase field description of oxide scale growth for the modelling of corrosion processes and the formation of protective layers in high-temperature applications. In the model we consider chemical reactions which are taking place both at the scale-air surface as well as at the scale-metal interface. Charged defects therefore play a central role, and their equilibrium distributions and diffusion through the oxide layer is influenced by external and self-generated electrostatic fields. The phase field framework for the description of the film growth is therefore supplemented by reaction-diffusion equations and consideration of the local electrical potential. The predictions are compared against sharp interface considerations.