Effect of hexagonal boron nitride nanoparticles as an additive on the extreme pressure properties of engine oil

Abstract

About Emerald www.emeraldinsight.comEmerald is a global publisher linking research and practice to the benefit of society. The company manages a portfolio of more than 290 journals and over 2,350 books and book series volumes, as well as providing an extensive range of online products and additional customer resources and services.Emerald is both COUNTER 4 and TRANSFER compliant. The organization is a partner of the Committee on Publication Ethics (COPE) and also works with Portico and the LOCKSS initiative for digital archive preservation. AbstractPurpose -This paper aims to investigate the effect of hexagonal boron nitride (hBN) nanoparticles on extreme pressure (EP) properties when used as an additive in lubricating oil. Design/methodology/approach -The nano-oil was prepared by dispersing an optimal composition of 0.5 vol. per cent of 70 nm hBN in SAE 15W-40 diesel engine oil using a sonication technique. The tribological testing was performed using a four-ball tribometer according to the ASTM standard. Findings -It was found that the nano-oil has a potential to decelerate the seizure point on the contact surfaces, where higher EP can be obtained. More adhesive wear was observed on the worn surfaces of ball bearing lubricated with SAE 15W-40 diesel engine oil as compared with the nano-oil lubrication. Originality/value -The results of the experimental studies demonstrated the potential of hBN as an additive for improving the load-carrying ability of lubricating oil.

Tribological investigation of diamond nanoparticles for steel/steel contacts in boundary lubrication regime

“…For a lubricant containing h-BN nanoparticles, the friction coefficient is comparatively less at the corresponding loads. This is due to the stable film formation capability of the boron element present in the boron nitride nanoparticles (Abdullah et al 2016), which is also shown in Fig. 17b.…”

Metal-containing nanomaterials as lubricant additives: State-of-the-art and future development

“…However, the most extensive studies have been carried out with metal-containing nanomaterials, whose NPs contain, e.g., metals, their oxides, and sulfides [32][33][34]. Importantly, some of the nanomaterials studied are commercial products [35][36][37][38][39], but most studies are concerned with self-made NPs. Various chemical and physical methods are used to obtain NPs [40][41][42][43][44], and they continue to improve.…”

The effect of nanoparticle-added solid lubricant on the formability of sheet metal

“…On this subject, Gulzar et al [5] prepared a large-scale literature review that examined the tribological properties of nanoparticles added to lubricants. In this review, the effect of nanoparticles on lubricity was revealed by four different lubrication mechanisms such as a ball bearing effect [6][7][8], protective film formation [9][10][11], mending effect [12], and polishing effect [13].…”

“…Herrmann et al [7] determined the cooling and lubrication properties of vegetable oils using the grinding test. Abdullah et al [8] determined the properties of nanoparticle-added lubricants under high pressure using the four-ball method. In addition, methods such as ring compression [17,18] and pin on disk [5,19] were used to determine the friction coefficient and lubricant effect in forming processes.…”