Abstract
It is generally taught that low friction and high wear proof of mechanical parts and surfaces are always required. From the commonsense in the world, people already know that we should concern about environmental problems, especially for minimizing the amount of oil use. The carbonaceous thin coating such as Diamond-Like Carbon (DLC) is one of the capable candidates to reduce friction and wear. In this review, we would like to summarize the mechanism of low friction of DLC and CNx, especially for Ali Erdemir, Julian Fontaine and Noritsugu Umehara as strategy of research work. Firstly, the summary of hydrogenated DLC which showed superlow friction by repulsive force is reported. Secondly, the role of hydrogen gas onto low friction of hydrogenated DLC is written. Finally, the superlow friction by CNx and the structural change are summarized.
