Abstract
In the present paper, the influence of self-mated friction materials on the tribological properties of hydrogenated amorphous silicon films (a-Si:H films) is studied systemically at high temperature. The results are obtained by comparing the tribological properties of a-Si:H films under different friction pair materials and temperatures. The a-Si:H films exhibit super-low friction of 0.07 at a temperature of 600 °C, and ceramic materials are appropriate for anti-friction behaviors of a-Si:H films at high temperature. The results of tribotests and observations of the fundamental friction mechanism show that super-low friction of a-Si:H films and ceramic materials of the friction system are involved in high temperature oxidation; this also applies to the tribochemical reactions of a-Si:H films, steel and iron silicate in open air at elevated temperature in the friction process.
Highlights
With the rapid development of military, aerospace and industrial robots, equipment have been run under harsh operating conditions such as high temperature
The lubricious composite oxides are generated from the interlayer of hydrogenated amorphous silicon films (a-Si:H films) at the interface due to tribochemistry reactions in the friction process [8]
The a-Si:H films were deposited on a steel substrate and the tribological properties of a-Si:H films were investigated under high temperature
Summary
With the rapid development of military, aerospace and industrial robots, equipment have been run under harsh operating conditions such as high temperature. It is well known that the tribological problem is one of the scientific challenges of engineering applications in friction systems under high temperature conditions [1]. Diamond-like carbon (DLC) films have been the subject of intensive studies in recent years and exhibit a number of attractive tribological properties such as super-low friction and DLC films being considered excellent candidate materials for tribological applications below 300 ◦ C [5,6,7]. DLC films are confined to the environmental temperature above 300 ◦ C where oxidation occurs. It was concluded that a-Si:H films are beneficial to produce lubricious oxides and achieve high temperature super-low friction. It would be expected to resolve high friction problems of high temperature tribology in industrial applications [9,10]. The a-Si:H films were deposited on a steel substrate and the tribological properties of a-Si:H films were investigated under high temperature
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