Friction and wear reduction by graphene nano platelets for hybrid nano Aluminium matrix composite under dry sliding conditions

Abstract

Friction losses and wear losses are the main failure reasons in the internal combustion (IC) engine components i.e., cylinder liner and piston. So, it demands lightweight self-lubricating low friction and wear-resistant materials to increase the efficiency and reduce the emission issue of the IC engine. In this concern, tribological tests are performed on self-lubricating aluminium composites samples reinforced with 6 wt.% of γ-Al2O3 and Graphene Nano Platelets (GNP) with varying concentration (0.5 wt.% - 5 wt.%), using ball-on-disc tribo-configuration under dry sliding conditions. The scope of this study is to investigate the anti-friction and anti-wear properties of GNP as reinforcement in the hybrid nanocomposite. The hybrid nanocomposite samples are fabricated using Spark Plasma Sintering (SPS) fabrication route. From the results, it is reported that friction and wear reduction percentage is 37.43 % and 51.64 %, respectively for the hybrid nanocomposite with 5 wt. % GNP. It is attributed to the inclusion of GNP, which reduces the Coefficient of Friction (COF) and improves wear resistance of the composite significantly.

Enhancement of microstructural, mechanical and tribological properties of hybrid Al- CNTs through electroless deposition of innovative h-BNs contents coated Ag and Ni for purpose of ball bearing

“…Hybrid metal matrix nanocomposites (HMMNCs) represent an exciting and promising advancement in materials science and engineering [1][2][3].These materials are developed by incorporating nanoparticles and/or nanofibers into a metal matrix to create a composite material with enhanced properties. HMMNCs offer several advantages and are considered the next generation of metal matrix nanocomposites (MMNCs) for advanced industrial applications [2,4,5].…”

Assessment of mechanical and tribological performance of hybrid Al/MoS2/Al2O3 composite by GFRA

“…In addition, introducing a new attribute improves the performance of a hybrid composite. To reduce the weight of the composite, the primary feature must be achieved first, followed by superior physical, mechanical, and tribological characteristics [4,5].…”

Impact of surface texturing on the tribological behaviour of aluminium-silicon (Al-Si/Al2O3) advanced composite under dry and lubricating conditions

“…It was informed that by adding 0.5 wt% GO the wear coefficient was reduced by 60%-80%. Srivyas et al [35][36][37][38] used graphite, graphene, hexagonal boron nitride, alumina, as nanoadditive in the poly alpha olefin grade 4 (PAO-4) lubricant for spark plasma sintering (SPS) fabricated eutectic aluminium-silicon (Al-Si) alloy and alloy based composites and report an improvement in the tribological properties in comparison to the base lubricant.…”