DPG Phi
Verhandlungen
Verhandlungen
DPG

Dresden 2009 – scientific programme

Parts | Days | Selection | Search | Downloads | Help

MM: Fachverband Metall- und Materialphysik

MM 20: Poster Session I

MM 20.7: Poster

Tuesday, March 24, 2009, 14:45–16:30, P4

How to apply a simulation of field evaporation of intermetallic phases to extract material parameters — •Torben Boll and Talaat Al-Kassab — Institut für Materialphysik, Georg-August Universität Göttingen, 37077 Göttingen, Friedrich-Hund-Platz 1

In this contribution the authors will present a model of the field evaporation process, which is used to reconstruct 3D AtomProbe Tomography (APT) data. The model is based on the commonly used Müller-Schottky-Method to calculate field evaporation field strengths. The simulations are valid for universal formulation and will be focused towards intermetallic phases, such as L10-TiAl and L12-Cu3Au in this presentation. By comparing the results of the simulations with experimental data with the AtomVicinity algorithm material parameters such as the Cu-Au binding energy, the ionization energy or field evaporation field strengths of the respective species can be estimated. Artifacts that are visible in the experimental APT-data can be explained as well. The AtomVicinity algorithm explores the local environment of the atoms and delivers the site occupation of the different species at the respective sublattice positions.

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2009 > Dresden