Tungsten film(W film) is deposited by using the ion beam assisted deposition(IBAD) on the 316 L substrate surface in this experiment. The micro structure and nano-hardness of the film are investigated by scanning elec...Tungsten film(W film) is deposited by using the ion beam assisted deposition(IBAD) on the 316 L substrate surface in this experiment. The micro structure and nano-hardness of the film are investigated by scanning electron microscopy(SEM) and nano-indentation tester. The tribological behavior of W film under lubrication by oil with ZDDP and MoDTC is evaluated by a SRV test machine. The tribo-film formed on the worn surfaces is investigated by X-ray photoelectron spectroscopy(XPS) to find out the tribological mechanisms between the W film and the two additional additives. The result shows that the W film lubricated by ZDDP and MoDTC-blended base oil has synergistic effects on the friction reduction property, while the anti-wear property is mainly caused by the hard surface of W film.展开更多
Oil-in-water(O/W) emulsions are widely used in metal working such as hot rolling and cutting.Three kinds of O/W emulsions with low oil concentration were prepared which include conventional emulsion(CE),miniemulsion(M...Oil-in-water(O/W) emulsions are widely used in metal working such as hot rolling and cutting.Three kinds of O/W emulsions with low oil concentration were prepared which include conventional emulsion(CE),miniemulsion(MNE) and microemulsion(ME).The lubricating properties of O/W emulsions with low oil concentration were investigated using the tribological testers and the thin film interferometry based on the relative optical interference intensity method.The tribological test results under boundary lubrication show that the friction coefficient and the total losing weight can be clearly seen:CE < MNE < ME.The lubricating film thicknesses under elastohydrodynamic lubrication and thin film lubrication show that a relationship of the film formation abilities:CE > MNE > ME.Competitive wetting behavior of water and oil on solid surface was confirmed to play an important role in the film formation and tribological behaviors of O/W emulsion.展开更多
基金the Beijing Natural Science Foundation (3132023)the National Natural Science Foundation of China (51275494 and 51005218)+1 种基金the Fundamental Research Funds for the Central Universities (2652012115 and 2652013081)the Tribology Science Fund of State Key Laboratory of Tribology (SKLTKF13B10) for their financial support to this research
文摘Tungsten film(W film) is deposited by using the ion beam assisted deposition(IBAD) on the 316 L substrate surface in this experiment. The micro structure and nano-hardness of the film are investigated by scanning electron microscopy(SEM) and nano-indentation tester. The tribological behavior of W film under lubrication by oil with ZDDP and MoDTC is evaluated by a SRV test machine. The tribo-film formed on the worn surfaces is investigated by X-ray photoelectron spectroscopy(XPS) to find out the tribological mechanisms between the W film and the two additional additives. The result shows that the W film lubricated by ZDDP and MoDTC-blended base oil has synergistic effects on the friction reduction property, while the anti-wear property is mainly caused by the hard surface of W film.
基金supported by the Ph.D. Programs Foundation of Ministry of Education of China (Grant No. 20100007120010)the Tribology Science Fund of State Key Laboratory of Tribology (Grant No. SKLTKF11A05)Science Foundation of China University of Petroleum,Beijing (GrantNo. KYJJ2012-04-17)
文摘Oil-in-water(O/W) emulsions are widely used in metal working such as hot rolling and cutting.Three kinds of O/W emulsions with low oil concentration were prepared which include conventional emulsion(CE),miniemulsion(MNE) and microemulsion(ME).The lubricating properties of O/W emulsions with low oil concentration were investigated using the tribological testers and the thin film interferometry based on the relative optical interference intensity method.The tribological test results under boundary lubrication show that the friction coefficient and the total losing weight can be clearly seen:CE < MNE < ME.The lubricating film thicknesses under elastohydrodynamic lubrication and thin film lubrication show that a relationship of the film formation abilities:CE > MNE > ME.Competitive wetting behavior of water and oil on solid surface was confirmed to play an important role in the film formation and tribological behaviors of O/W emulsion.
