author = "Ardila-Rodr{\'{\i}}guez, L. A. and Menezes, B. R. C. and Pereira 
                         Constancio, Lania Auxiliadora and Takahashi, R. J. and Oliveira, 
                         A. C. and Travessa, D. N.",
          affiliation = "{Universidade Federal de S{\~a}o Paulo (UNIFESP)} and {Instituto 
                         Tecnol{\'o}gico da Aeron{\'a}utica (ITA)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Universidade Federal 
                         de S{\~a}o Paulo (UNIFESP)} and {Universidade Federal de S{\~a}o 
                         Paulo (UNIFESP)} and {Universidade Federal de S{\~a}o Paulo 
                title = "Surface modification of aluminum alloys with carbon nanotubes by 
                         laser surface melting",
              journal = "Surface and Coatings Technology",
                 year = "2019",
               volume = "377",
                pages = "UNSP 124930",
                month = "Nov.",
             keywords = "MWCNT, Aluminum alloy, Laser surface melting.",
             abstract = "Carbon nanotubes (CNTs) could be an excellent reinforcement for 
                         metal matrix composites, specifically for composites with aluminum 
                         or aluminum alloy matrix. Surface modification to improve hardness 
                         and other material properties has been performed by laser surface 
                         melting (LSM) process, where the laser beam melts the substrate 
                         together with alloying elements or reinforcing phase additives. In 
                         this work, Multiwalled CNTs (MWCNTs) were mixed by the 
                         electrostatic adsorption process with aluminum powder and the 
                         resulting mixed powder was laser melted on the surface of a 
                         6061-aluminum alloy substrate. As a result, a modified substrate 
                         suffice has been obtained from the Al/MWCNT - substrate 
                         co-melting, dilution and re-solidification processes. This 
                         modified layer was obtained by different LSM parameters and were 
                         characterized by Optical (OM) and Scanning Electron Microscopy 
                         (SEM), Energy Dispersive X-Ray Spectroscopy (EDS), Field Emission 
                         Gun Scanning Electron Microscopy (FEG-SEM), X-Ray Diffraction 
                         (XRD) and Raman Spectroscopy (RS). The resulting mechanical 
                         behavior was evaluated by Vickers microhardness tests. The results 
                         showed that the presence of MWCNT in the aluminum powder improves 
                         the laser energy absorption, leading to the formation of a deeper 
                         modified layer, with segregation of Si particles homogeneously 
                         dispersed and improving the hardness. The formation of Al4C3 was 
                         not observed, evidencing that the MWCNTs did not react with the 
                         molten Al matrix during the LSM process.",
                  doi = "10.1016/j.surfcoat.2019.124930",
                  url = "http://dx.doi.org/10.1016/j.surfcoat.2019.124930",
                 issn = "0257-8972",
             language = "en",
           targetfile = "ardila_surface.pdf",
        urlaccessdate = "18 abr. 2021"