| 摘要: |
| 采用旋涂法在7050铝合金表面制备了内含0、1.3%、3.8%纳米二维黑磷的聚四氟乙烯（PTFE）薄膜涂层。选择载荷为1 N(接触压力为501 MPa)、2 Hz频率和5.3mm滑动行程条件下（平均线速度为21.2mm/s），使用球-盘摩擦仪进行摩擦磨损试验。利用环境扫描电镜(ESEM)和三维白光显微镜分别对涂层磨痕形貌和磨损率进行表征。黑磷含量为1.3%和3.8%的PTFE涂层的摩擦系数(COF)分别降低了23%(COF：0.079)和27%(COF：0.074)，其磨损率分别从2.554×10-4mm3N-1m-1降至0.758×10-4mm3N-1m-1（降低70.3%）和0.156×10-4 mm3N-1m-1（降低93.8%）。结果表明，纳米黑磷材料与PTFE的复合膜不仅具有较好的润滑作用，而且能有效提高PTFE的耐磨性。 |
| 关键词: 黑磷 聚四氟乙烯 涂层 润滑性能 |
| DOI： |
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| 基金项目:北京市自然科学基金(3182010) |
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| Preparation and Tribological Properties of PTFE Films Containing Nano-two-dimensional Black Phosphorus |
| PENG Shiguang,WANG Jie,CHEN Xianping,GUO Yue,XIE Guoxin |
| (State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University;Beijing Institute of Astronautical Systems Engineering) |
| Abstract: |
| Polytetrafluoroethylene (PTFE) film coatings with 0, 1.3% and 3.8% naro-two-dimensional black phosphorous were prepared on 7050 aluminum alloy by spin coating method. The friction wear test was carried out by using ball-on-disk tribometer with the selection of load as 1 N (contact pressure :501 MPa), 2 Hz frequency and 5.3mm sliding displacement (mean linear velocity 21.2mm/s). Three-dimensional white light and environmental scanning electron micro-scopy (ESEM) were used to characterize the wear amount and morphology of the coatings. The coefficient of friction (COF) of PTFE coatings with black phosphorus content of 1.3% and 3.8% decreased by 23% (COF: 0.079) and 27% (COF: 0.074), respectively, while the wear rate decreased from 2.554×10-4mm3N-1m-1 to 0.758×10-4mm3N-1m-1 (decreased by 70.3% ) and 0.156×10-4mm3N-1m-1 (decreased by 93.8%). The results show that the black phosphorus and PTFE composite with 2-D layered and unique honeycomb structure can not only provide good lubrication, but also greatly improve the wear resistance of PTFE. |
| Key words: Black phosphorus Polytetrafluoroethylene（PTFE） Coating Lubricity |