Lim D P, Lee J Y, Lim D S, Ahn S G, Lyo I W
Department of Material Science and Engineering, Korea University, Anam-Dong 5-1, Sungbuk-Ku, Seoul 136-701, Korea.
J Nanosci Nanotechnol. 2009 Jul;9(7):4197-201. doi: 10.1166/jnn.2009.m31.
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.
研究了纳米金刚石增强聚四氟乙烯（PTFE）复合涂层的摩擦学性能。通过在有机溶剂中用陶瓷珠研磨进行纳米金刚石聚集体的机械粒度减小和分散。通过研磨时间控制粒径。将包含与各种尺寸的纳米金刚石混合的PTFE溶液的糊剂涂覆在铝基板上。进行球-盘式磨损试验以研究摩擦和磨损行为。结果表明，添加纳米金刚石有效地改善了PTFE涂层的摩擦学性能。纳米金刚石尺寸的减小并不总是能提高PTFE涂层的耐磨性。通过对磨损表面和磨损碎屑的观察解释了这种意外行为。
