The approach built in the lab aims to establish and understand the correlations between the microstructure of a solid and its capability to be altered. The final goal is then to be able to predict and/or control the physico-chemical parameters responsible for the increase (or the decrease) of the dissolution rate.
In this aim, the studies need to develop a transverse approach combining the mastering of elaboration and sintering steps of model compounds (e.g. Th1-xUxO2 or Th1-xPux
The understanding of dissolution mechanisms occurring at the solid/liquid interface constitutes the second part of this work. Theories of dissolution, generally applied to geochemical considerations, are mostly based on the existence of activated complex. They were recently extended to ceramic materials in the frame of the NOMADE network, dedicated to specific radwaste matrices for long live radionuclides. It could be split into two correlated approaches: