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• W2996192802 abstract "Many studies have been devoted to the study of surface films formed in the presence of various ester-based oils, but attempts to analyze the “friction polymer” have had limited success. This is due to the difficulty of analyzing a chemically complex reaction product, the reagents of which were unknown, and the product was available only in very small quantities. Since the antifriction film is very difficult to separate from the friction surface, wear particles formed in the lubricating ester medium (for example, bis-2-ethylhexyl adipate or bis-2-ethylhexyl sebacate) were subjected to the study. The wear particles formed during friction in ester lubricants are black, do not have a metallic luster, form volumetric precipitates or suspensions in the lubricant that practically do not settle in time. Such particles are an anti- friction film removed from friction surfaces. It was believed that the study of wear particles will allow a deeper study of the processes leading to the formation of an anti-friction film. Using the method of IR spectroscopy of the ATR, we investigated refined sunflower oil, as well as wear particles and the friction track formed in this oil. It was found that a characteristic difference in the spectrum of wear particles is the appearance of a peak at 1531 cm−1, which indicates the formation of C-O-Fe bonds. In the spectrums of the antifriction film and the original oil, this peak is not detected. The amount of iron in the wear particles formed in various lubricating media was determined by analytical methods. The extremely high iron content excludes the possibility of the formation of a stoichiometric polymer compound with C-O-Fe bonds. The results of differential thermogravimetric analysis showed the presence of non-volatile polymeric organic compounds that are formed during friction from the molecules of the lubricating medium. A significant number of molecules of the original oils are present in the wear particles, even though the studied particles were treated with a solvent before the experiment to remove excess oil. Differential thermogravimetric analysis data showed that the iron in the wear particles is in the form of oxide. This is also confirmed by the magnetic susceptibility of wear particles, as well as the general non-stoichiometric content of iron and organic components. The absence in the IR spectrum of the friction track of the absorption band characteristic of the C-O-Fe bond indicates that iron in the antifriction film appears as a result of the accumulation of wear particles on it.Many studies have been devoted to the study of surface films formed in the presence of various ester-based oils, but attempts to analyze the “friction polymer” have had limited success. This is due to the difficulty of analyzing a chemically complex reaction product, the reagents of which were unknown, and the product was available only in very small quantities. Since the antifriction film is very difficult to separate from the friction surface, wear particles formed in the lubricating ester medium (for example, bis-2-ethylhexyl adipate or bis-2-ethylhexyl sebacate) were subjected to the study. The wear particles formed during friction in ester lubricants are black, do not have a metallic luster, form volumetric precipitates or suspensions in the lubricant that practically do not settle in time. Such particles are an anti- friction film removed from friction surfaces. It was believed that the study of wear particles will allow a deeper study of the processes leading to the formation of an anti-friction fi..." @default.
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• W2996192802 date "2019-01-01" @default.
• W2996192802 modified "2023-10-12" @default.
• W2996192802 title "Study of wear particles formed in some ester lubricants" @default.
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• W2996192802 doi "https://doi.org/10.1063/1.5138375" @default.
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