Microstructure et imagerie des matériaux

Microstructure and imaging of materials

The analysis of the rock microstructure (organization of minerals and pores) is pivotal for understanding their geological history and physical properties (fluid transfer and mechanical behavior). To solve this, imaging techniques are subject to intense developments and widely applied both for academic researches and industrials applications. The obtained data feed realistic modelling approaches of macroscopic physical properties of rocks.

The aim is to understand the physics, the advantages and limitations of the different methods available for characterizing the microstructure in order to be able to combine them in a multiscale approach and feed realistic modelling of rock properties.

Prerequisites

• Beam/matter interactions, excel, clay crystal-chemistry.

Content

• Advanced gas adsorption methods for pore network and reactive surface analyses.

• Preparation methods for microscopy

• 2D/3D imaging techniques of the solid skeleton and pore network at different scales : quantitative mapping of minerals and porosity from core scale down to the crystal scale

• Practices: acquisition and advanced treatment of gas adsorption isotherms and imaging data (chemical mapping, X-ray tomography, 2D and 3D high resolution scanning electron microscopy, autoradiograph).

• Savoir utiliser les méthodes d’imagerie actuelles afin de caractériser la microstructure des matériaux à différentes échelle en considérant les avantages et limitations de chaque technique
• Savoir appréhender avec recul les méthodes globales classiquement utilisées pour la caractérisation des réseaux poreux et de son remplissage au cours de l’hydratation