@InProceedings{SilvaUedPicReuLep:2007:EfPlPo,
               author = "Silva, Maria Margareth and Ueda, M{\'a}rio and Pichon, Luc and 
                         Reuther, Helfried and Lepienski, Carlos Maur{\'{\i}}cio",
          affiliation = "{Instituto Tecnol{\'o}gico de Aeron{\'a}utica (ITA)} and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {Universit{\'e} de Poitiers} and {Institute of Ion Beam Physics 
                         and Materials Research} and {Universidade Federal do 
                         Paran{\'a}}",
                title = "Effects of plasma potential in the layer thickness of TI-6AL-4V 
                         alloy treated by immersion ion implantation at 800oC",
                 year = "2007",
         organization = "Encontro Brasileiro de F{\'{\i}}sica dos Plasmas, 9.",
             abstract = "The present work aims to study the in°uence of plasma potential 
                         (PP) in the layer thickness obtained by Plasma Immersion Ion 
                         Implantation (PIII) in the Ti-6Al-4V alloy at 800oC, using 
                         nitrogen gas. It is expected to obtain a thicker layer, to enhance 
                         further the already excellent surface mechanical properties of 
                         this alloy and improve its wear resistance. Treatments by PIII at 
                         800oC were carried out during 120 minutes with low PP (90V) and 
                         high PP (420V). An electron shower source was used to lower the 
                         potential in the Żrst case. In the sample treated in high PP, the 
                         nitrogen rich layer thickness is approximately 100 nm (measured by 
                         Auger electron spectroscopy - AES) and the maximum values of 
                         hardness is 21.5 GPa, in the treated surface. The hardness proŻles 
                         were obtained by nanoindentation technique and the hardness values 
                         of the untreated sample were around 4.0 GPa to 5.5 GPa. The 
                         Ti-6Al-4V specimen treated at low PP presented depth layer of 1000 
                         nm (measured by glow discharge optical spectroscopy - GDOS) and 
                         its maximum value of hardness were around 19.0 GPa. Another sample 
                         was treated during 240 minutes at low PP, resulting in a modiŻed 
                         layer of approximately 1500 nm (measured by GDOS) and the reached 
                         value of hardness was about 19.5 GPa. These results conŻrm that in 
                         the lower plasma potentials, a greater quantity of nitrogen ions 
                         are difused into the material surface (due to a lower sputtering 
                         rate), resulting in deeper treated layers with better mechanical 
                         properties as wanted for applications where the alloy has contact 
                         with another surfaces.",
  conference-location = "S{\~a}o Pedro, SP",
      conference-year = "25-28 Nov.",
             language = "pt",
        urlaccessdate = "15 jun. 2024"
}