author = "Carreri, F. C. and Oliveira, R. M. and Oliveira, A. C. and Silva, 
                         M. M. N. F. and Ueda, M{\'a}rio and Silva, M. M. and Pichon, L.",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {Instituto Nacional de Pesquisas Espaciais 
                         (INPE)} and {Instituto Tecnol{\'o}gico de Aeron{\'a}utica (ITA)} 
                         and {Institut Pprime}",
                title = "Phase formation and mechanical/tribological modification induced 
                         by nitrogen high temperature plasma based ion implantation into 
              journal = "Applied Surface Science",
                 year = "2014",
               volume = "310",
                pages = "305--310",
             keywords = "Alumina, Emission spectroscopy, Friction, Glow discharges, 
                         Hardness, Molybdenum, Nitrides, Nitrogen, Wear of materials, X ray 
                         diffraction, Glow-discharge optical emission spectroscopy, High 
                         temperature, High-temperature plasmas, Plasma-based ion 
                         implantation, Surface mechanical properties, Technological 
                         applications, Transition metal nitrides, X-ray diffraction 
                         spectrum, Ion implantation.",
             abstract = "Transition metal nitrides present high hardness, good wear 
                         resistance and chemical stability. The formation of a surface 
                         layer of these materials on different types of substrates can 
                         improve surface properties without changing bulk characteristics. 
                         Molybdenum is used in many technological applications and the 
                         search for ways to effectively improve its properties is 
                         justified. In this work nitrogen ions were implanted into 
                         molybdenum by means of high temperature plasma based ion 
                         implantation (HTPBII), in order to produce a layer of molybdenum 
                         nitride on the surface of the material. The treatment was 
                         performed in the temperature range of 800-1200C, for 1 h. X-ray 
                         diffraction spectra showed the presence of the cubic-Mo2N phase in 
                         most of the samples. The tetragonal-Mo2N phase was also observed, 
                         depending on treatment conditions. Glow discharge optical emission 
                         spectroscopy was used to study the composition and thickness of 
                         the nitride layer. A 12 m thick Mo2N layer was observed for 
                         samples treated at 1100C, although beyond this temperature 
                         threshold, a significant amount of nitride can no longer be 
                         produced. In relation to the surface mechanical properties, a 
                         ninefold increase in surface hardness was obtained, as well as a 
                         decrease in the friction coefficient. Wear against an alumina ball 
                         was not observed.",
                  doi = "10.1016/j.apsusc.2014.03.086",
                  url = "http://dx.doi.org/10.1016/j.apsusc.2014.03.086",
                 issn = "0169-4332",
                label = "scopus 2014-11 CarreriOlOlSiUeSiPi:2014:PhFoMe",
             language = "en",
           targetfile = "Carreri_phase.pdf",
        urlaccessdate = "29 nov. 2020"