@Article{MitmaPillacaTravRami:2021:AxDiIm,
               author = "Mitma Pillaca, Elver Juan de Dios and Trava-Airoldi, Vladimir 
                         Jesus and Ramirez Ramos, Marco Antonio",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)}",
                title = "Axial distribution improvements of DLC film on the inner surface 
                         of a long stainless steel tube",
              journal = "Surface and Coatings Technology",
                 year = "2021",
               volume = "412",
                pages = "e126996",
                month = "Apr.",
             keywords = "DLC film growth inside tube, Coating inside tube, Carbon thin 
                         film, Low friction coefficient.",
             abstract = "The internal surface of a stainless steel AISI 304 tube, 200 cm in 
                         length and 10 cm in diameter, was coated with diamond-like carbon 
                         (DLC) using the Plasma Enhanced Chemical Vapor Deposition (PECVD) 
                         technique, using two group of experiments for the entry and exit 
                         of the gas flow to determine the effect of their position on the 
                         quality and thickness of the DLC film. First, the temperature rise 
                         along the tube surface was measured during the argon and acetylene 
                         plasma phase. Secondly, the PECVD experiments were analyzed to 
                         evaluate the coating for all arrangements used. Thus, the tube 
                         temperature, the film thickness, the structural changes and the 
                         friction coefficient were measured, using optical microscopy, an 
                         infrared Thermometer, a Raman Spectrometer and a pin-on-flat 
                         tribometer, respectively. Our measurements revealed DLC films with 
                         symmetrical and asymmetrical distributions along the tube. Raman 
                         and tribological characterization shown that the lowest I(D)/I(G) 
                         ratio and lowest friction coefficient were in the regions with 
                         thickest DLC films. The study indicates that DLC films may be 
                         grown by PECVD inside of long tubes that exhibit excellent 
                         thickness and friction characteristics when entry/exit points for 
                         the gas flow are placed at both ends of the tube.",
                  doi = "10.1016/j.surfcoat.2021.126996",
                  url = "http://dx.doi.org/10.1016/j.surfcoat.2021.126996",
                 issn = "0257-8972",
             language = "en",
           targetfile = "pillaca_axial.pdf",
        urlaccessdate = "20 maio 2024"
}