Éditorial O. Asserin, P. Gilles, M. Afzali, P. Bastid, J.-M. Carpreau, D. Deloison, E. Feulvarch, B. Journet, M. Coret and D. Lawrjaniec Matériaux & Techniques, 98 4 (2010) 249 Published online: 22 December 2010 DOI: 10.1051/mattech/2010109