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Designing multilayer diamond like carbon coatings for improved mechanical properties

Journal of Materials Science & Technology 2021年第6期65卷 108-117页

作者： Mohammad Sharear Kabir Zhifeng Zhou Zonghan Xie Paul Munroe School of Materials Science and Engineering University of New South WalesSydneyNSW.2052Australia mineAlloy Institute for Frontier MaterialsDeakin UniversityWaum PondsVIC3217Australia Advanced Coatings Applied Research Laboratory Department of Mechanical and Biomedical EngineeringCity University of Hong Kong.KowloonHong KongChina School of Mechanical Engineering University of AdelaideSA5005Australia School of Engineering Edith Cowan University.WA6027Australia

New multilayer coatings were produced by incorporating alternating soft and hard DLC layers enabled by varying the bias voltage during deposition process while maintaining a constant hard-to-soft layer thickness *** coatings were deposited onto a Cr/Cr Cxgraded layer by closed field unbalanced magnetron sputtering(CFUBMS).The cross-sectional analysis of the coatings showed that the multilayer coatings possess sharp interfaces between the soft and hard layers with the hard to soft layer thickness ratio(1:1.33)constant in all the *** analysis uncovered the increasing sp^(3)character of the DLC coatings as a result of decreasing ID/IGratio and increasing full width at half maximum(FWHM)values of the G band peak induced supposedly by an increase in bias voltage during hard layer *** tests showed an increase in hardness of the DLC coatings which can be correlated with the increase in the sp^(3)content of the coatings as well as decreasing sp^(2)-C cluster size,as calculated from the ID/***,the coatings exhibited excellent plastic deformation resistance and adhesion strength upon microindentation and scratch testing,*** further investigations are required to assess coating durability,the multilayer design could offer the DLC coatings with a rare opportunity to combine the high hardness with damage resistance with a constant bilayer thickness and without the need to introduce complex multilayer system.

关键词： Diamond like carbon(DLC) Closed field unbalanced magnetron sputtering(CFUBMS) sp^(3)Character Nanoindentation Plastic deformation resistance scratch adhesion behaviour

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