Abstract
This paper presents an experimental platform which is used to study the effect of Diamond-Like-Carbon (DLC) coating on surface roughness. Variety of experiments is conducted and the effect of variation of the coating process parameters and type and combination of sub-layers on the surface roughness of the coated part is discussed. It is shown how DLC coating can decrease the surface roughness and the amount of decrease has direct relationship with the coating thickness. It is shown that with a thick enough coating, approximately the same surface roughness results can be obtained from surfaces with different uncoated roughness. This means that if a part is going to be DLC coated to achieve a certain tribological property, the surface finishing process during machining can be reduced.
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