Tribological Properties of CVD Diamond Films against Zirconia Ceramic

Abstract

Microcrystalline diamond (MCD), nanocrystalline diamond (NCD) and microcrystalline and nanocrystalline composite diamond (MNCD) films are all deposited on flat square shaped WC-6%Co substrates by using bias-enhanced hot filament chemical vapor deposition (HFCVD) apparatus. The diamond films are characterized with scanning electron microscope (SEM) and Raman spectrum. Typical diamond film features are exhibited in the observation of SEM and the analysis results of Raman spectrum. The tribological properties of diamond films against zirconia ceramic are conducted on a ball-on-plate type rotating reciprocating tribometer in ambient air. The average friction coefficients of MCD, NCD and MNCD film in stable period are 0.205, 0.181 and 0.138 respectively. The images of surface topography based on white-light interferometer suggest a very low wear rate of CVD diamond film.

Electrophoretic deposition of bioglass reinforced zirconia for biomedical application

“…The coating is expected to enhance the surface properties and bioactivity of the titanium alloy. Several coating techniques are available to deposit high quality bio-ceramic thin films such as plasma electrolytic oxidation, plasma spraying and chemical/physical vapour deposition [27][28][29][30]. These conventional methods involve very high processing temperatures and lengthy deposition time.…”

In-vitro bioassay of electrophoretically deposited hydroxyapatite–zirconia nanocomposite coating on Ti–6Al–7Nb implant

“…ZrO 2 as a bioinert ceramic has good wear and corrosion resistance as well as good biocompatibility [19,20]. Bioceramic thin films can be fabricated by various techniques such as plasma spraying [21], pyrolysis [22], chemical/physical vapour deposition [23,24], plasma electrolytic oxidation [25] and pulsed laser deposition [26]. However, these methods involve high temperatures and time-consuming.…”