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首页> 外文期刊>Applied Surface Science >Preparation Of Flame Sprayed Poly(tetrafluoroethylene-co-hexafluoropropylene) Coatings And Their Tribological Properties Under Water Lubrication
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Preparation Of Flame Sprayed Poly(tetrafluoroethylene-co-hexafluoropropylene) Coatings And Their Tribological Properties Under Water Lubrication

机译：火焰喷涂聚（四氟乙烯-六氟丙烯）涂料的制备及其水润滑下的摩擦学性能

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摘要

Poly(tetrafluoroethylene-co-hexafluoropropylene) (FEP) coatings were prepared on AISI-1045 steel via flame spraying. The chemical changes of the FEP powder occurring during the spraying process were analyzed by means of Fourier transformation infrared spectroscopy. The flame spraying of the FEP powders under the chosen conditions did not lead to structural changes related to degradation and oxidation. The friction and wear behaviors of the FEP coatings sliding against AISI-52100 steel ball under dry- and water-lubricated conditions were investigated using a ball-on-disc test rig, and the worn surface morphologies of the coatings were also observed using the scanning electron microscope. The FEP coatings recorded smaller friction coefficients under water lubrication than under dry sliding. However, the wear rate of the coating under water lubrication was about two times of that under dry sliding. This indicated that water as a lubricant was able to effectively reduce the friction coefficient but it led to an increased wear rate of the FEP coatings/steel sliding pairs. X-ray photoelectron spectroscope (XPS) results illustrate that the transfer film did formed during the dry sliding but it is hindered under water lubrication, and it might be the major cause of the larger wear rate under the water lubrication.
机译：通过火焰喷涂在AISI-1045钢上制备了聚四氟乙烯-共六氟丙烯（FEP）涂层。通过傅立叶变换红外光谱分析了在喷涂过程中发生的FEP粉末的化学变化。在选定条件下对FEP粉末进行火焰喷涂不会导致​​与降解和氧化有关的结构变化。使用圆盘试验机研究了FEP涂层在干润滑和水润滑条件下在AISI-52100钢球上滑动的摩擦和磨损行为，并通过扫描观察了涂层的磨损表面形态电子显微镜。 FEP涂层在水润滑条件下的摩擦系数要比干滑动条件下的摩擦系数小。但是，在水润滑条件下，涂层的磨损率约为干滑动条件下的两倍。这表明水作为润滑剂能够有效降低摩擦系数，但导致FEP涂层/钢制滑动副的磨损率增加。 X射线光电子能谱仪（XPS）的结果表明，在干滑过程中确实形成了转移膜，但在水润滑下受阻，这可能是水润滑下较大的磨损率的主要原因。

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