Tribological properties and wear mechanism of sputtered C/Cr coating
- Yang, S
- Li, X
- Renevier, Nathalie
- Teer, D.G
- Teer Coatings Ltd., 290 Hartlebury Trading Estate, Hartlebury DY10-4JB, United Kingdom
- School of Metallurgy and Materials, University of Birmingham, Birmingham, United Kingdom
DOIAbstract
Carbon/chromium (C/Cr) coatings were co-deposited using unbalanced magnetron sputtering deposition technique. The tribological properties including wear mechanism and microstructures of the coatings were investigated using pin-on-disc tribometer, X-ray diffraction (XRD) and transmission electron microscope (TEM). The coatings were characterised by a high hardness (∼2200 HV), a low coefficient of friction (<0.1) and a very low wear rate under very high loads. The pin-on-disc tests of C/Cr coated tool steel against WC ball (5 mm of diameter) revealed low friction coefficient 0.06–0.1 depending on load and low wear rate ∼10−17 m3/Nm with little dependence on load and sliding speed for the test using load up to 80 N and siding speed up to 400 m...
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