Abstract
Dry, lubricated and pre-lubricated tribological behaviour of plasma-sprayed ceramic coatings under 450 °C was studied. Eight different ceramic powders are used to make the coatings. The results show that the dry friction coefficients of most couples are about 0.5. Only one couple shows a rather low friction coefficient (0.12, when the Hertz load is 0.20 GPa) and low wear rate in the dry friction process. This couple is expected to be used as a self-lubrication pair. The friction coefficient of all the couples is in the range 0.043–0.142 when lubrication is used. Additionally, the wear rate is strongly influenced by the used lubricant.
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