我所汪朋飞讲师在国际期刊Surface & Coatings Technology发表论文阅读次数 [1323] 发布时间 :2014-12-18 12:18:19
我所汪朋飞讲师等论文:Low frictions of self-mated CNx coatings in dry and humid inert gas environments,发表于国际期刊Surface & Coatings Technology。
Low frictions of self-mated CNx coatings in dry and humid inert gas environments
Surface & Coatings Technology, 258, 1137 (2014) (PDF-File)
Pengfei Wang , and Koshi Adachi.
The friction behavior of CNx coated Si3N4 disk sliding
against CNx coated Si3N4 ball (denoted as CNx/CNx) in dry and humid inert gas environments (i.e. nitrogen, argon,
and helium) is investigated in this study. The sliding contact of self-mated
CNx coatings has been realized thanks to the promising two-step ball-on-disk
friction test, where the rubbed Si3N4 ball in the running-in stage (step 1) is
replaced by a new CNx coated Si3N4 ball in the subsequent stage (step 2). As a
result, friction coefficients of less than 0.05 are obtained for self-mated CNx
coatings in all three dry inert gas environmentswith relative humidity under
5%RH.Moreover, friction coefficients of less than 0.10 are obtained for the
sliding contact of CNx/CNx in inert gas environmentswith relative humidity of
larger than 35%RH. Especially, the lowest friction coefficient of 0.020 is
achieved in the nitrogen gas environment with relative humidity of 37%RH.
Furthermore, the sliding contact of self-mated CNx coatings survives after friction
tests in humid nitrogen and argon gas environments. The low frictional
performance and low sensitivity of friction to water vapor for the self-mated
CNx coatings in inert gas environments are mainly attributed to the formation
of a sp2 rich carbon tribo-layer on the mating surface. The pronounced
frictional performance of selfmated CNx coatings has made them good candidates
for the demanding industrial applications.