AFM, RBS and tribological properties of WC/WS2 nanostructures after 1.5 MeV Nb+ implantation. - Burducea, I.; Mateescu, A.O.; Mateescu, G.; Ionescu, C.; Straticiuc, M.; Craciun, L.S.; Lungu, C.P.; Pompilian, G.O.; Racolta, P.M. (Nuclear Instruments & Methods in Physics Research Section B, 2019)