Modelling mesoporous alumina microstructure with 3D random models of platelets - Mines Paris Accéder directement au contenu
Article Dans Une Revue Journal of Microscopy Année : 2015

Modelling mesoporous alumina microstructure with 3D random models of platelets

Dominique Jeulin
François Willot
Matthieu Faessel
  • Fonction : Auteur
  • PersonId : 975978
Loïc Sorbier
Maxime Moreaud


This work focuses on a mesoporous material made of nanometric alumina "platelets" of unknown shape. We develop a 3D random microstructure to model the porous material , based on 2D Transmission Electron Microscopy (TEM) images, without prior knowledge on the spatial distribution of alumina inside the material. The TEM images , acquired on samples with thickness 300 nm, a scale much larger than the platelets's size, are too blurry and noisy to allow one to distinguish platelets or platelets aggregates individually. In a first step, the TEM images correlation function and integral range are estimated. The presence of long-range fluctuations, due to the TEM inhomogeneous detection , is detected and corrected by filtering. The corrected correlation function is used as a morphological descriptor for the model. After testing a Boolean model of platelets, a two-scales model of microstructure is introduced to replicate the statistical dispersion of platelets observed on TEM images. Accordingly a set of two-scales Boolean models with varying physically-admissible platelets shapes is proposed. Upon optimization, the model takes into account the dispersion of platelets in the microstructure as observed on TEM images. Comparing it to X-ray diffraction and nitrogen porosimetry data, the model is found to be in good agreement with the material in terms of specific surface area.
Fichier principal
Vignette du fichier
WangEtAl20150630.pdf (12.62 Mo) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-01170616 , version 1 (01-07-2015)



Haisheng Wang, Andrea Pietrasanta, Dominique Jeulin, François Willot, Matthieu Faessel, et al.. Modelling mesoporous alumina microstructure with 3D random models of platelets. Journal of Microscopy, 2015, 260 (3), pp.287-301. ⟨10.1111/jmi.12295⟩. ⟨hal-01170616⟩
323 Consultations
244 Téléchargements



Gmail Mastodon Facebook X LinkedIn More