J. Phys. IV France 01 (1991) C7-47-C7-50
LASER SHOCK COMPACTION OF POROUS MATERIALSD. ZAGOURI1, J.-P. ROMAIN2, B. DUBRUJEAUD3 and M. JEANDIN3
1 Peugeot S.A., Etudes et Recherches, D.R.A.S., Route de Gizy, F-78140 Vélizy, France
2 Laboratoire d'Energétique et de Détonique, URA-CNRS 193, ENSMA, F-86034 Poitiers, France
3 Centre des Matériaux Pierre-Marie Fourt, Ecole des Mines de Paris, BP. 87, F-91003 Evry, France
Laser-driven shock-waves are used as a surface treatement for compacting porous materials. The compaction depth is typically a few hundreds of microns. The behavior of the porous medium is described through a compaction model based on the α theory of Herrmann. This model has been introduced into a one-dimensional finite difference hydrodynamic code describing the behavior of a target under the action of a laser-generated shock-wave. The code enables us to compute the compaction depth as a function of irradiation conditions, nature and initial porosity of the material. Experiments are performed on aluminum powder. Samples are observed by optical microscopy. The residual porosity is estimated by image analysis. Experimental results and computed compaction profiles correlate well.
© EDP Sciences 1991