%0 Journal Article
%A Alonso, F.
%A García, A.
%A Ugarte, J. J.
%A Viviente, J. L.
%A Oñate, J. I.
%A Baranda, P. S.
%A Cooper, C. V.
%T Changes in tribological properties of an AISI 440C martensitic stainless steel after ion implantation of carbon at very high doses
%D 1996
%@ 0257-8972
%U https://hdl.handle.net/11556/4611
%X Ion implantation of N+ or C+ has been proven to be a suitable technique for improving tribological properties of steels. In the case of C+ implantation at very high doses, amorphization and a carbonaceous layer can be formed on the surface, the latter of which reduces adhesion when like-on-like material contact conditions occur, thereby decreasing surface wear and friction. A study to determine the influence of C+ ion implantation at very high doses (exceeding 1018 ions cm-2) on tribo-mechanical properties of AISI 440C steel is presented in this work. Ball-on-disc wear and friction tests using an AISI 440C steel ball showed a decrease of wear with increasing dose of more than one order of magnitude. A reduction in friction coefficient was also measured, from 1.0 down to 0.4. C 1s spectra from XPS analyses showed the presence of C-C bonds in the ion-implanted samples, suggesting the formation of a graphitic layer on the surface, responsible for the decrease in surface wear and friction after ion implantation.
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