@InProceedings{SiqueiraUedaLepiReuh:2009:ImSaIm,
               author = "Siqueira, R. H. M. and Ueda, M{\'a}rio and Lepienski, C. M. and 
                         Reuhter, H.",
          affiliation = "UNESP and {Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         UFPR and IIBPMR",
                title = "Improvement of Satellite Imaging Camera Components Made of SS 304 
                         by Nitrogen PIII Treatments",
                 year = "2009",
         organization = "International Workshop on Plasma-Based Ion Implantation and 
                         Deposition, 10. (PPI\&D).",
             abstract = "The steel SS 304 is an austenitic stainless steel for which the 
                         main elements of the alloy are nickel and chrome. Their chemical 
                         and mechanical properties allow great number of application in the 
                         medical and aerospace area. In our project 3IP-E (Plasma Immersion 
                         ion implantation in components for space applications), taking 
                         advantages of these properties, we used this process to modify the 
                         surface of a satellite imaging camera (MUX) component consisting 
                         of a anti-vibration stopper for focusing system. It was verified 
                         that in some vibration experiments a plastic deformation and a 
                         cold welding resulted for that part when no surface treatment was 
                         made. For this reason, a PIII nitrogen treatment was carried out, 
                         improving the resistance to the wear of SS 304 steel component. 
                         Two sets of samples were prepared for the PIII nitrogen treatments 
                         using 3 hours and 4 hours and a half. The conditions of the 
                         treatment were: 6x10-3 mbar work pressure, 300 Hz frequency, 50 
                         {\`{\i}}s pulselength and 12 kV voltages. After the treatments, 
                         the samples were submitted to Auger Electron Spectroscopy (AES) 
                         and nanindentation. The AES showed that despite of the different 
                         time of treatments, the nitrogen depth penetration on both of the 
                         samples were the same. The depth was 680 nm and the peak atomic 
                         concentration was 31%. The nanoindentation tests revealed an 
                         expressive raise in the hardness of the treated samples, reaching 
                         2.5 to 3.0 times, compared to the standard ones. Therefore, the 
                         results of the nanoindentation, Auger Electron Spectroscopy and 
                         vibration experiments proved that the PIII nitrogen treatment 
                         improved the SS 304 made satellite camera crucial components, as 
                         proposed in our project.",
  conference-location = "S{\~a}o Jos{\'e} dos Campos, SP",
      conference-year = "7-11 Sept.",
        urlaccessdate = "03 maio 2024"
}