Analytical modelling of the radiative properties of metallic foams: Contribution of X-ray tomography
Résumé
The morphological properties of metallic foams of similar porosities and different cell sizes were retrieved using the X ray tomography to calculate the radiative properties of metallic foams. The distribution of cell size and the strut thickness, which are useful to calculate the radiative properties, were measured by 3D granulometry, and the sizes are obtained in the present study by an image processing procedure called sequential openings granulometry, applied to the two phases. This mathematical morphological study leads to a volume frequency distribution of the size of different features of the phase of interest in the material. The shape of the element used during these operations has a great influence on the measured value of the cell and strut size. Tomography enables to assume more realistic cell shapes, such as combination of the pentagon dodecahedron and tetracaedecahedron cell.