The 4^th Rencontres Internationales sur la Projection Thermique and the 3^rd Suspension ans Solution Thermal Spraying will be held together in the Conférence Center, Métropole Auditorium pour la Culture, les Congrès et les Séminaires (MACCS) from 2 to 4 December 2009 located on the Campus of the University of Sciences and Technologies of Lille (USTL).