“…It is possible to work under vacuum (classical SEM) or under controlled atmosphere (H 2 O, O 2 , He+H 2 , N 2 , air...). Different types of studies have been reported, relative to corrosion of metals (Jonsson et al, 2011), oxidation of metals (Schmid et al, 2001a(Schmid et al, , 2001bOquab & Monceau, 2001 ;Schmid et al, 2002 ;Abolhassani et al, 2003 ;Reichmann et al, 2008 ;Jonsson et al, 2009 ;Mège-Revil et al, 2009 ;Quémarda et al, 2009 ;Delehouzé et al, 2011), reactivity at high temperature (Maroni et al, 1999 ;Boucetta et al, 2010), phase changes (Fischer et al, 2004 ;Hung et al, 2007 ;), hydrogen desorption (Beattie et al, , 2011, redox reactions (Klemensø et al, 2006), microstructural modifications (Bestmann et al, 2005 ;Fielden, 2005 ;Yang, 2010), magnetic properties (Reichmann et al, 2011), sintering (Sample et al, 1996 ;Srinivasan, 2002 ;Marzagui & Cutard, 2004 ;Smith et al, 2006 ;Subramaniam, 2006 ;Courtois et al, 2011 ;Joly-Pottuz et al, 2011 ;Podor et al, 2012), thermal decomposition (Gualtieri et al, 2008 ;Claparède et al, 2011 ;Goodrich & Lattimer, 2011 ;Hingant et al, 2011), crystallisation (Gomez et al, 2009 in melts (Imaizumi et al, 2003 ;Hillers et al, 2007) and study of self-repairing -self-healingproperties of materials …”