Tribological behavior of DLC films deposited on nitrided and post-oxidized stainless steel by PACVD

E. L. Dalibon, S. P. Brühl, D. Heim

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


In this work, the tribological behavior and adhesion of DLC films deposited by PACVD on AISI 420 martensitic stainless steel was evaluated. Prior to DLC deposition, the samples were nitrided and some of them also post-oxidized. The films were characterized by Raman and EDS, microhardness was assessed with Vickers indenter and the microstructure was analyzed by OM, SEM, FIB. Fretting and linear reciprocating sliding tests were performed using a WC ball as counterpart, and the adhesion of the DLC films was characterized using the Scratch Test and Rockwell C indentation. Corrosion behavior was evaluated by the Salt Spray Fog Test. The film showed a hardness of only about 1500 HV but it was about 15-20 microns thick. The results of the mechanical tests showed that pre-treatments (nitriding and oxidizing) of the substrate did not have a big influence in the tribological behavior of the coating. However, the nitriding treatment before the DLC coating process reduced the interface stress and enhanced the adhesion. Additionally, all the films evidenced good corrosion resistance in a saline environment, better than the AISI 420 itself.

Original languageEnglish
Article number012029
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 2012
Event14th Latin American Workshop on Plasma Physics, LAWPP 2011 - Mar del Plata, Argentina
Duration: 20 Nov 201125 Nov 2011


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