FOR 741 "Nanoscale processes and geomaterial properties"
The research unit "Nanoscale processes and geomaterials properties" is funded from 2007 to 2013 by the German Science Foundation (DFG) and the Austrian Science Fund (FWF) - Speakers are Wilhelm Heinrich (GFZ) and Rainer Abart (University of Vienna).
The research includes several closely interconnected projects such as (1) atomic structure, thermodynamic and kinetic properties of grain boundaries, (2) diffusion in polycrystals, (3) exsolution in mineral systems and (4) fluid assisted mineral replacement. Among others, projects address how grain- and phase boundaries are generated during homogeneous and heterogeneous nucleation, and how the network of grain and phase boundaries may evolve during thermally and stress induced re-crystallization. The focus lies on experimentation and theoretical work, and is complemented by studies on natural material and applied mineralogy.
News on the Research Unit’s website
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- Yb diffusion from thin layer into the grain boundary of a YAG bicrystal. X-ray fluorescence map acquired at 24.4keV for Yb (La) Each pixel measured is 120 x120 nm, the FIB lamella is inclined with respect to the incident X-ray beam, causing a slightly distorted image of the real geometry. Colours range in intensity from black through blue, red, orange and yellow to white with increasing concentration.
Contact: Wilhelm Heinrich