کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
614171 | 1454807 | 2016 | 9 صفحه PDF | دانلود رایگان |
• Environmental H atoms can significantly reduce the friction of DLC films.
• At low friction temperatures, the friction is reduced by C atom passivation.
• At high friction temperatures, friction reduction is induced by H atoms diffusion.
Influence of environmental H atoms on the tribological behaviors of DLC films is investigated via molecular dynamics simulations. These H atoms significantly reduce the friction force, and the reduction mechanisms depend on friction temperatures. At low friction temperatures, the H atoms are concentrated near contact interfaces, and their passivations highly reduce the interfacial adhesion, resulting in the low friction force. However, high friction temperatures induce the significant diffusion of the H atoms into the DLC films and thermally expand such films and increase their graphitization, causing a wide region with easy-shear properties to reduce the friction force. It is believed that these mechanisms of friction reduction can improve the understanding of the superlow friction of DLC films in H2 environment.
Journal: Tribology International - Volume 99, July 2016, Pages 258–266