@Article{Ardila-RodríguezMePeTaOlTr:2019:SuMoAl,
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
(UNIFESP)}",
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 = "27 abr. 2024"
}