Sliding element
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United States of America Patent
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Nov 26, 2019
Grant Date -
Jun 22, 2017
app pub date -
Dec 20, 2016
filing date -
Dec 21, 2015
priority date (Note) -
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Abstract
A sliding element, for example a piston ring for an internal combustion engine, may include a sliding face, an adhesive layer disposed on the sliding face, and a coating disposed over the adhesive layer. The coating may be composed of an amorphous carbon material. The coating may have a ratio between sp3 bonds and sp2 bonds that indicates a predominance of sp2 bonds. The coating may have a roughness profile including a value of Rpk of ≤0.15 μm and a value of Rz of 0.7≤Rz≤1.5 μm.
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