Influence of deposition time on chromatics during nitrogen-doped diamond like carbon coating on pure titanium

Objective The aim of this study was to observed the influence of deposition time on chromatics during nitrogen-doped diamond like carbon coating(N-DLC) on pure titanium by multi impulse arc plasma plating machine.Methods Applying multi impulse arc plasma plating machine to produce TiN coatings on pure titanium in nitrogen atmosphere,then filming with nitrogen-doped DLC on TiN in methane(10-80 min in every 5 min).The colors of N-DLC were evaluated in the CIE1976 L*a*b* uniform color scale and Mussell notation.The surface morphology of every specimen was analyzed using scanning electron microscope(SEM) and X-ray photoelectron spectroscopy(XPS).Results When changing the time of N-DLC coating deposition,N-DLC surface showed different color.Golden yellow was presented when deposition time was 30 min.SEM showed that crystallization was found in N-DLC coatings,the structure changed from stable to clutter by varying the deposition time.Conclusion The chromatics of N-DLC coatings on pure titanium could get golden yellow when deposition time was 30 min,then the crystallized structure was stable.