latest development of high-temperature tribological properties of diamond-like-carbon coatings

The latest progress in the extensive study of the high-temperature tribological properties of the diamondlike-carbon (DLC) coatings was tentatively reviewed. The discussions, including but not limited to, i) The stringent requirements in the extreme environment of the DLC coatings, such as the strong wear-resistance, low friction coefficient, and high thermal stability, for fabrication of a variety of complicated engines in aerospace and nuclear industries; ii) The synthesis and modification technologies of the DLC coatings, as well as the impact of the deposition conditions, for instance, doping of a metal and/or a non-metal, on its high-temperature tribological properties and microstructures; and iii) Characterization of the microstructures and tribological properties of the modifed DLC coatings. In addition, the technical limitations, possible solutions and development trends, in synthesizing the advanced high-temperature lubrication DLC coatings, were also discussed brielfly in a thought-provoking way. It is urgent to apply in the solid lubrication coatings under the high temperature in aerospace and nuclear energy field to improve surface performance of mechine components and increase the efficiency and life of the engine. According to the requriments of industry and national defense, high temperature lubrication coatings and wear-resistant materials were defined as an important research direction of the development of tribology in 1980 s. In this paper, the progress of the tribological properties of diamond like carbon films under high temperature in recent years was reviewed. The tribological behaviors and their effectes were investigated under high temperature. The analysis methods of the tribological behaviors under high temperature were represented. The existing problems and future research considerations were proposed.