title: Effect of reinforcement particle size on the tribological properties of nano-diamond filled polytetrafluoroethylene based coating.
abstract: The tribological properties of PTFE composite coatings reinforced by nano-diamonds were investigated. Mechanical particle size reduction and dispersion of nano-diamond aggregates were performed by milling with ceramic beads in an organic solvent. Particle size was controlled by the milling time. Pastes comprising a PTFE solution mixed with nano-diamond having various sizes were coated on the aluminum substrate. Ball-on-plate type wear test was performed to investigate the friction and wear behavior. The results indicated that the addition of nano-diamonds effectively improved tribological performance of the PTFE coating. The reduction in nano-diamond sizes were not always improved the wear resistance of PTFE coating. This unexpected behavior was explained by observation on the worn surfaces and wear debris.
authors.affiliation: Department of Material Science and Engineering, Korea University, Anam-Dong 5-1, Sungbuk-Ku, Seoul 136-701, Korea.
authors.forename: D P
authors.initials: DP
authors.lastname: Lim
authors.forename: J Y
authors.initials: JY
authors.lastname: Lee
authors.forename: D S
authors.initials: DS
authors.lastname: Lim
authors.forename: S G
authors.initials: SG
authors.lastname: Ahn
authors.forename: I W
authors.initials: IW
authors.lastname: Lyo