Effects of oil-in-water based nanolubricant containing TiO2 nanoparticles on the tribological behaviour of oxidised high-speed steel. (June 2017)

• Record Type: Journal Article
• Authors: Xia, Wenzhen; Zhao, Jingwei; Wu, Hui; Jiao, Sihai; Jiang, Zhengyi
• Is Part Of: Tribology international. Volume 110(2017)
• Page Start: 77
• Page End: 85
• Publication Date: 2017-06
• Subjects: Oil-in-water based nanolubricant -- TiO2 nanoparticle -- Tribological behaviour -- Lubrication mechanism; Tribology -- Periodicals; 621.89
• DOI: 10.1016/j.triboint.2017.02.013
• Languages: English
• ISSNs: 0301-679X

Abstract

Abstract: In this work, the effects of the developed oil-in-water (O/W) based nanolubricants containing TiO2 nanoparticles (NPs) on the tribological behaviour of oxidised high-speed steel (HSS) were studied, using pin-on-disc tests. The pin was made of HSS and, prior to the wear test, was oxidised to form a scale layer on the surface. The results show that the TiO2 NPs in the O/W lubricant can achieve an excellent reduction of the coefficient of friction (COF) and improve the anti-wear properties of pins with oxidised surfaces. The TiO2 NPs in the nanolubricant were found to have the filling and tribo-sintering effects. The NP aggregation around the contact area was observed with higher TiO2 NP concentrations in the nanolubricant, revealing a larger NP aggregation area. Based on the results and analysis, the mechanism about the effects of the TiO2 NPs in the O/W based nanolubricant on the wear and COF were well explained. Highlights: Surface oxidation can improve wear resistance under oil-in-water based TiO2 nanolubrication. Suitable oil-in-water based TiO2 nanolubricant can reduce friction and wear. A lubrication mechanism of oil-in-water based TiO2 nanolubricant is proposed. The nanoparticles aggregation area is observed and analysed.