Rearrangement of the structure during nucleation of a cordierite glass doped with TiO2

Marie Guignard (1) , Laurent Cormier (1) , Valérie Montouillout (2, 3) , N. Menguy (1) , Dominique Massiot (2, 3) , Alex C. Hannon (4) , Brigitte Beuneu (5)

1 IMPMC - Institut de minéralogie et de physique des milieux condensés
2 CEMHTI - Conditions Extrêmes et Matériaux : Haute Température et Irradiation
3 FRMN-SHC - Fédération RMN du Solide à Hauts Champs
4 ISIS Facility
5 LLB - UMR 12 - Laboratoire Léon Brillouin

Ordering of disordered materials occurs during the activated process of nucleation that requires the formation of critical clusters that have to surmount a thermodynamic barrier. The characterization of these clusters is experimentally challenging but mandatory to improve nucleation theory. In this paper, the nucleation of a magnesium aluminosilicate glass containing the nucleating oxide TiO2 is investigated using neutron scattering with Ti isotopic substitution and 27Al NMR. We identified the structural changes induced by the formation of crystals around Ti atoms and evidenced important structural reorganization of the glassy matrix.

Mots clés: glass; nucleation; neutron diffraction; solid state NMR; electronic microscopy

Domaines: Science des matériaux [cond-mat.mtrl-sci]; Matériaux; Systèmes désordonnés et réseaux de neurones [cond-mat.dis-nn]

Marie Guignard, Laurent Cormier, Valérie Montouillout, N. Menguy, Dominique Massiot, et al.. Rearrangement of the structure during nucleation of a cordierite glass doped with TiO2. 2010. ⟨hal-00465234⟩