@Article{MelloUeSiRePiLe:2009:TrEfPl,
               author = "Mello, Carina Barros and Ueda, M{\'a}rio and Silva, M. M. and 
                         Reuther, H. and Pichon, L. and Lepienski, C. M.",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Tecnol{\'o}gico de Aeron{\'a}utica (ITA)} and {Institute of Ion 
                         Beam Physics and Materials Research} and {Universit{\'e} de 
                         Poitiers} and {Universidade Federal do Paran{\'a} (UFPR)}",
                title = "Tribological effects of plasma immersion ion implantation heating 
                         treatments on Ti-6Al-4V alloy",
              journal = "Wear",
                 year = "2009",
               volume = "267",
               number = "WEARPart 2 Sp. Iss. SI",
                pages = "867--873",
                month = "Jun.",
             keywords = "Ti-6Al-4V, Plasma immersion ion implantation, Pin-on-disc, Wear, 
                         surface modification, corrosion behavior, titanium-alloys, 
                         ti6al4v, nitridation, improvemen.",
             abstract = "In order to achieve improved surface in components with high 
                         reliability required by the tool or metallurgical industries by 
                         means of plasma immersion ion implantation (PIII), it is necessary 
                         to obtain quite thick treated layers with reasonable thickness 
                         uniformity. One effective way to achieve such a thick 
                         nitrogen-rich layer in Ti-6Al-4V alloy is to run PIII process in 
                         high temperatures of about 800 degrees C. In these experiments, we 
                         heated the sample-holder and subjected the Ti-6Al-4V samples to 
                         nitrogen glow discharge PIII with relatively low peak voltages (5 
                         kV). We also treated the Ti-6Al-4V samples by the traditional PIII 
                         method, increasing slowly the high voltage pulse intensities, and 
                         at the end of processing, reaching temperatures of up to 350 
                         degrees C. These modes of treatments were compared with respect to 
                         nitrogen implantation profiles, tribological and mechanical 
                         properties. Nitrogen profiles measured by AES showed that 
                         auxiliary heating leads to richer and deeper layers. The best 
                         results were obtained for the samples treated for 4h that, after 
                         25,000 cycles in unlubricated pin-on-disk test, presented very 
                         small wear (reduction of 89%). In spite of friction coefficient 
                         being higher in the beginning of the test, probably due to the 
                         increase of the average roughness (Rms) in the surface of the 
                         treated material, it decreases when the rough surface wears away, 
                         due to the reduction of frictional force necessary to slide the 
                         pin on the sample. The material treated at 800 degrees C presents 
                         high wear resistance, which is desired in this alloy, that 
                         normally possesses excellent mechanical properties, however, poor 
                         tribological properties.",
                  doi = "10.1016/j.wear.2008.12.103",
                  url = "http://dx.doi.org/10.1016/j.wear.2008.12.103",
                 issn = "0043-1648",
             language = "en",
        urlaccessdate = "03 maio 2024"
}