Abstract

It was found experimentally that the friction between a partly polished diamond coating and a metal surface was drastically reduced to zero as relative speed increased to a few m/s. It seems that diamond coating took off the counter surface because sliding was noiseless in their experiment. In the previous work, we performed numerical simulations of micro-/nanoscale gas flow between the two sliding surfaces and successfully reproduced lift force large enough to suspend the slider used in the experiment. In the present study, we investigate the effect of gas properties on molecular gas-film lubrication.

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