Effect of reinforcement particle size on the tribological properties of nano-diamond filled polytetrafluoroethylene based coating.
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.
Lim
D P
DP
Department of Material Science and Engineering, Korea University, Anam-Dong 5-1, Sungbuk-Ku, Seoul 136-701, Korea.
Lee
J Y
JY
Lim
D S
DS
Ahn
S G
SG
Lyo
I W
IW