Tribological properties of ultra nanocrystalline diamond film-effect of sliding counterbodies

We report role of sliding counterbodies which change the friction and wear properties of ultra nanocrystalline diamond (UNCD) film. Interestingly, SiC ball shows high value of friction coefficient ∼0.4 while low and ultra low values of friction coefficient are obtained using non carbon based ceramics and metallic counterbodies. Deviation in friction coefficient while changing the counterbodies is correlated to the contact adhesion of sliding interface. Origin of increased value of friction coefficient of UNCD films sliding against SiC ball is attributed to the presence of dangling covalent σ bonds of carbon atoms which possibly increase the adhesive force in the sliding plane.

Coefficient of friction of UNCD film sliding against various ceramic and metallic balls.Figure optionsDownload high-quality image (152 K)Download as PowerPoint slideHighlights
► Synthesis of ultra nanocrystalline diamond film.
► Effect of sliding counterbodies in changing friction and wear properties.
► High friction coefficient of UNCD sliding with SiC ball.
► High friction coefficient caused by generation of dangling bonds.
► Low and ultra low friction coefficient sliding with metallic and non carbon based ceramics.