Nanostructured carbon-metal composite films
Pulsed laser deposition system. A graphite-metal composite target is ablated at room temperature, resulting in the formation of a diamondlike carbon-metal nanocomposite film.
(a) -contrast dark field image of diamondlike carbon–titanium nanocomposite film FGTi2, (b) -contrast dark field image of diamondlike carbon–silver nanocomposite film FGAg1.
(a) Electron energy loss near the carbon- edge of diamondlike carbon–silver nanocomposite FGAg1, (b) electron energy loss near the carbon- edge of diamondlike carbon–titanium nanocomposite FGTi2. The peak in the region from results from the excitation of electrons from the ground state to the vacant antibonding state. The peak in the region above results from the excitation of electrons from the ground state to the higher state.
Visible Raman spectrum of diamondlike carbon–titanium nanocomposite film FGTi3. Diamondlike carbon-metal nanocomposite films exhibit greater asymmetry in the -band and a slight increase in the -band height.
Load vs depth obtained from scratch testing of diamondlike carbon–titanium nanocomposite FGTi1. Cycles of abrupt up and down motion signify coating delamination ahead of the moving tip.
Scratch result for diamondlike carbon–silver nanocomposite FGAg1 at normal load. The scratch tip had reached the substrate, and plastic deformation of the Ti–6Al–4V substrate was observed.
Scratch result for diamondlike carbon–titanium nanocomposite FGTi1 at normal load. Forward chevron cracks in the scratch direction were observed at this load.
Target arrangements for diamondlike carbon-metal nanocomposite films.
Young’s modulus and nanohardness values for diamondlike carbon-metal nanocomposite films.
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