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1986
Journal Article
Titel
Properties of polymeric layers of hydrogenated amorphous carbon produced by a plasma-activated chemical vapour deposition process II
Titel Supplements
Tribological and mechanical properties
Abstract
In the present paper some mechanical properties of polymeric layers of amorphous hydrogenated carbon produced by a plasma-activated chemical vapour deposition process are reported. Some unusual behaviour was found for the sliding friction and for elastic and plastic deformations. In particular, parameters influencing the friction were studied in detail and it could be shown that the extremely low friction between a steel ball and the polymeric layer in dry N2 or in ultrahigh vacuum and the very high friction in dry O2 are correlated to a difference in material transfer between the two sliding components. The elastic and plastic properties of the polymeric layers were determined by a rather new method which is especially suitable for thin layers (ultramicroindentation apparatus) and were found to be comparable with those of stell. In contrast with the frictional behaviour these properties depend strongly on the deposition parameters.