火焰喷涂聚苯硫醚(PPS)复合涂层在水环境中的摩擦磨损性能研究

利用火焰喷涂技术在45#钢表面制备了炭纤维增强聚苯硫醚复合涂层并研究了其结构和力学性能,采用MM-200型摩擦磨损试验机对比考察了复合涂层同不锈钢对摩时在干摩擦与水环境中的摩擦磨损性能,并对涂层及偶件磨损表面形貌进行观察分析,采用X射线光电子能谱仪分析了偶件磨损表面典型元素的化学状态,探讨了涂层在水环境中的抗磨机理.结果表明:用火焰喷涂工艺制备聚苯硫醚复合涂层的过程中,聚苯硫醚粉末未发生明显降解与氧化;炭纤维含量影响复合涂层的粗糙度、显微硬度及与底材的结合强度;在水环境中炭纤维增强聚苯硫醚涂层表现出比聚苯硫醚涂层更优良的抗磨性能,这是由于水的冷却与冲刷作用使得复合涂层向偶件磨损表面的粘着转移明显减轻的缘故.

Tribological Behavior of POLY (Phenylene Sulphide) Coating and Carbon Fiber Reinforced Composites Coating under Dry Sliding and Water Lubrication

PPS coating and carbon fiber reinforced PPS composite coating were prepared on AISI1045 steel substrate by flame spraying. Microstructure and morphology of coalescent with substrate of coating were studied with FTIR and SEM. Friction and wear characteristics of PPS coating and carbon fiber reinforced PPS composite coating under water and dry sliding against stainless steel were comparatively investigated using a block-ring tester. Worn surface of composite coating and counterpart steel ring were investigated using SEM. Typical elements on the counterpart steel ring were analyzed by XPS. In dry sliding friction of carbon reinforced PPS composite coating exhibited lower friction coefficient and higher wear rate than pure PPS coating did. But under water lubrication PPS composite coating exhibited excellent tribological performance with lower friction and wear rate in comparison with pure PPS coating. Under water lubrication, water play the role of cooling and washing, so transfer film had smaller effect on the tribological behavior of composite coating than under dry sliding. Wear mechanism of composite coating under dry sliding and water lubrication is different.