The damage mechanisms involve a complex interplay between chemical reactions and transport problems under strong stress gradients in the neighborhood of glass-environment interfaces (confined or not). The effect of structural and chemical alterations on the local elastic properties and stress fields must also be accounted properly.
The damage mechanisms are investigated at the bulk level by spectroscopic techniques, at the nanometer scale by AFM observations and at the molecular level by numerical modeling. This will allow in turn understanding the size effect on these properties. A special attention will be devoted to modeling the densification behavior of anomalous and normal glasses under hydrostatic pressure, as well as the influence of the water contents.
|Relaxor Ferroelectrics: Back to the Single-Soft-Mode Picture |
(Article) Publié: Physical Review Letters, vol. p.155501 (2016)
|Elastic Constants, Optical Phonons and Molecular Relaxations in the High Temperature Plastic Phase of the CH3NH3PbBr3 Hybrid Perovskite |
(Article) Publié: Journal Of Physical Chemistry Letters, vol. 7 p.3776-3784 (2016)
|Polarized Raman spectroscopy of v-SiO2 under rare-gas compression |
(Article) Publié: Physical Review B, vol. 93 p.224303 (2016)
Involved researchers : M. Ciccotti, M. George, A. Grimaldi, G. Pallares (Collaboration L. Wondraczek, E. Charlaix)
The environmental condition at the crack tip has a determinant effect on the (...)