author = "Santos, Nazir Monteiro dos and Mariano, Samantha de F{\'a}tima 
                         Magalh{\~a}es and Ueda, M{\'a}rio",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)}",
                title = "Carbonfilms deposition as protective coating of titanium alloy 
                         tube usingPIII\&D system",
              journal = "Surface and Coatings Technology",
                 year = "2019",
               volume = "375",
                pages = "164--170",
                month = "Oct.",
             keywords = "Carbon films, Plasma Immersion Ion Implantation and Deposition 
                         (PIII\&D), Surface modification, Metal tubes, Thin films, 
                         Protective coating.",
             abstract = "The purpose of this work is to deposit carbonfilms inside titanium 
                         alloy tube of small diameter, in order toincrease the corrosion 
                         resistance of its inner surface. The use of carbonfilms as 
                         protective coating can increasethe lifetime of the tubes used in 
                         propulsion and thermal control systems of satellites. They can 
                         also inhibit thepermeation of corrosive species, originated from 
                         the fuels and the coolingfluids, between thefilm-metal in-terface. 
                         Titanium alloy tube with 11 mm diameter and 150 mm length, with 
                         one side closed configuration wasplaced inside a vacuum chamber 
                         and pulsed to a high energy voltage. Carbonfilm deposition was 
                         performed byusing a Plasma Immersion Ion Implantation and 
                         Deposition (PIII\&D) system. The hollow cathode discharges(HCD) 
                         were produced with pulses of 2 kV, 15 A, 20\μs, and 500 Hz 
                         of repetition rate, using a RUP-6 pulser. Themaximum temperature 
                         measured at the surface of tubes was about 1000 C. The 
                         as-deposited carbonfilms wereanalyzed in terms of their 
                         microstructure, chemical composition, surface morphology and 
                         thickness. The surfacecharacterization of the carbonfilms were 
                         carried out by means of Raman Spectroscopy, Field Emission 
                         GunScanning Electron Microscopy (FEG-SEM), Atomic Force Microscopy 
                         (AFM) and Potenciodynamic Polarizationtests. The experimental 
                         results show an interesting change on the chemical structure of 
                         the as-deposited carbonfilms, when the deposition time varied from 
                         30 min to 240 min, resulting in thicker and quite adheredfilms 
                         onthe inner surface of tubes. In addition, the changes on the 
                         microstructure, seen by SEM analysis, as well as the 
                         ID/IGvariation indicate that nanocrystalline graphite (NC-G)films 
                         can be deposited on the inner surface of titaniumtubes by using 
                         this type of PIII\&D system.",
                  doi = "10.1016/j.surfcoat.2019.03.083",
                  url = "http://dx.doi.org/10.1016/j.surfcoat.2019.03.083",
                 issn = "0257-8972",
             language = "en",
           targetfile = "santos_carbon.pdf",
        urlaccessdate = "17 abr. 2021"