Purpose -The purpose of this paper is to investigate the tribological properties of liquid paraffin with SiO 2 nanoparticles additive made by a sol-gel method. Design/methodology/approach -The tribological properties of the SiO 2 nanoparticles as an additive in liquid paraffin are measured using a ball-onring wear tester to determine the optimal additive concentration. The mechanism that wear and friction are reduced is studied using scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), and atomic force microscope (AFM). Findings -Experimental results indicate that the sizes of the synthesized SiO 2 nanoparticles are distributed uniformly and that the optimal concentrations of SiO 2 nanoparticles in liquid paraffin is associated with better tribological properties than pure paraffin oil, and an anti-wear (AW) ability that depends on the particle size. Originality/value -It is shown in the paper that by reducing friction and AW, the lubricant prepared by the methods described can prolong operating hours of machinery.
Purpose -The purpose of this paper is to study the dispersion and tribological properties of liquid paraffin with aluminum nanoparticles as additive, which are prepared by the surface-modification method using oleic acid (OA). Design/methodology/approach -The dispersion stability of aluminum nanoparticles in liquid paraffin is measured by spectrophotometry, which can be optimization by Taguchi method. The tribological properties are evaluated by using a ball-on-ring wear tester. Findings -The results show that few concentrations of aluminum nanoparticles as additives in liquid paraffin have better antiwear and antifriction properties than the pure paraffin oil. Scanning electron microscopy and energy dispersive spectrometer analyses can show that the thin films on the rubbing surfaces can be formed by these aluminum nanoparticles, which not only bear the load but also separate the both interfaces, thus the wear and friction can be reduced. Originality/value -Machine components and mechanism pairs rely on high-quality lubricants to withstand high temperature and extreme pressure. Extreme pressure and antiwear additives are typically adopted to improve the tribological performance of a fluid lubricant in reducing friction and surface damage under severe conditions.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.