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In aerospace, some moving parts will meet with simultaneous high temperature and vacuum environments. In this study, the tribological behavior of a nickel alloy matrix solid lubricant composite was contrastively investigated under both air and vacuum conditions from room temperature to 800°C. Results showed that both the friction coefficient and the wear rate of the composite were highly dependent...
In this paper, the effect of the complex condition with high temperature and vacuum on the tribological properties of NiCrMoAl-Ag-CaF2/BaF2 solid-lubricating composite has been investigated. It presents that this composite displays the excellent tribological properties in vacuum than in air from room temperature to 800°C. In vacuum, the friction coefficients are around or below 0.20 and superior to...
The tribological behavior of nanocrystalline Fe88Si12 alloy in vacuum environment has been investigated compared with coarse grained counterpart. The results demonstrated that the friction coefficient of the Fe88Si12 alloy reduced with the decrease of both grain size and oxygen partial pressure. The wear resistance of the Fe88Si12 alloy improved more effective in vacuum than in air as the grain size...
In this study, we report that a layered Ti 3 AlC 2 ceramic exhibited three distinct tribological behaviors at different vacuum degrees. It is firstly found that the layered Ti 3 AlC 2 exhibited intrinsic self-lubricity under vacuum degree from 2.0×10 4 to 5Pa with the coefficient of friction (CoF) as low as 0.2 and nearly no wear. Under lower 0.1Pa and air atmosphere,...
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