FIELD: machine building.
SUBSTANCE: invention relates to sliding element, particularly, to piston ring with coating on at least one sliding surface which in the direction from inside to outside consists of an adhesive layer (10), a metal-containing (preferably tungsten-containing) DLC-layer (12) and a DLC-layer containing no metal (14). The relation of the width of the DLC-layer containing no metal to the width of metal-containing DLC-layer is from 0.7 to 1.5 and/or the relation to the total coating width is from 0.4 to 0.6, while the total coating width amounts to from 5 mcm to 40 mcm.
EFFECT: better sliding element in relation to the combination of friction factor and wear characteristics.
8 cl, 3 dwg, 3 ex
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