FIELD: engines and pumps.
SUBSTANCE: invention relates to ICE sliding element, particularly, to piston ring. Sliding element has ta-C-type DLC coating with at least one gradient of internal strain. Note here that coating mid area (II) I inward direction has negative gradient of internal strain, preferably, smaller than that in inside area (III). Coating area (III) features smaller depth of layer than that of mid area (II). Note here that this coating features depth of 10 mcm or larger.
EFFECT: longer life without loss of preset friction properties.
8 cl, 2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| SLIDING ELEMENT | 2010 |
|
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|
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