Effects of high-temperature hydrogenation treatment on sliding friction and wear behavior of carbide-derived carbon films

A.Erdemir 1*,
M.J.McNallan 3,
S.Welz 3,
A.Lee 3,
Y.Gogotsi 4***,
B.Carroll 4

1 Argonne National Laboratory, Energy Techology Division, Argonne, IL 60439, United States
2 Інститут проблем матеріалознавства ім. І. М. Францевича НАН України , вул. Кржижановського 3, Київ, 03142, Україна
3 Department of Civil and Materials Engineering, University of Illinois at Chicago, Chicago, IL 60607, United States
4 Department of Materials Science and Engineering, Drexel University, Philadelphia, PA 19104, United States
* gogotsi@drexel.edu, ** ankov@netzero.com, *** gogotsi@drexel.edu

Surface and Coatings Technology: Elsevier, 2004, Т.188


In this study, we investigated the effects of a high-temperature hydrogenation treatment on the sliding friction and wear behavior of nanostructured carbide-derived carbon (CDC) films in dry nitrogen and humid air environments. These films are produced on the surfaces of silicon carbide substrates by reacting the carbide phase with chlorine or chlorine–hydrogen gas mixtures at 1000 to 1100 8C in a sealed tube furnace. The typical friction coefficients of CDC films in open air are in the range of 0.2 to 0.25, but in dry nitrogen, the friction coefficients are 0.15. In an effort to achieve lower friction on CDC films, we developed and used a special hydrogenation process that was proven to be very effective in lowering friction of CDC films produced on SiC substrates. Specifically, the films that were post-hydrogen-treated exhibited friction coefficients as low as 0.03 in dry nitrogen, while the friction coefficients in humid air were ~0.2. The wear of Si3N4 counterface balls was hard to measure after the tests, while shallow wear tracks had formed on CDC films on SiC disks. Detailed mechanical and structural characterizations of the CDC films and sliding contact surfaces were done using a series of analytical techniques and these findings were correlated with the friction and wear behaviors of as-produced and hydrogen-treated CDC films.



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