Powertrain component with adherent film having a graded...

Details Powertrain component with adherent film having a graded... Powertrain component with adherent film having a graded...

C - Chemistry, Metallurgy

23

C

C23C 14/46 (2006.01) C23C 16/02 (2006.01) C23C 16/26 (2006.01) C23C 28/00 (2006.01) F01L 1/14 (2006.01)

Patent

CA 2110563

-26- Abstract A powertrain component (10) for use in an internal combustion engine, the powertrain component comprising a coating system including a film (30) selected from the group consisting of amorphous hydro- genated carbon, silicon-doped amorphous hydrogenated carbon, boron-, nitrogen-, boron nitride-, or metal- doped amorphous hydrogenated carbon, and mixtures thereof. The film (30) is formed on the powertrain component (10), and imparts the characteristics of low friction and wear resistance to the component. The powertrain component (10) also includes an interlayer (42) formed between the film and the component. The interlayer (42) accommodates stresses engendered by formation of the film (30), and thereby improves ad- herence of the film (30) to the substrate (10). To enable engineering of desired surface properties, the film (30), the interlayer (42), or both may be provid- ed with a graded composition.

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