Abstract
As one amorphous carbon consisting of sp2 and sp3 bonding, diamond-like carbon (DLC) films present excellent tribological characteristics. Meanwhile, frictional properties could present great complexity with the varied interaction. In this work, research on the tribological performances of hydrogenated DLC films under the various isobutane conditions, which was similar to some polar fluids, was carried out. The results showed that friction coefficient increased with the isobutane amount. And the wear was constant after a certain amount of isobutane was adsorbed. Combining these experimental results with models, the mechanism has been proposed. It was the isobutane molecules physisorbed on the interface that prevented the hydrogenated DLC films from wear, resulting in the increasing of friction coefficient with gas pressure.
Published Version
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