The tribological behavior of hybrid aluminum alloy nanocomposites at High temperature: Role of nanoparticles

Abstract

The influence of the addition of hexagonal boron nitride nanoparticles and silicon carbide nanoparticles on dry sliding tribological properties of the AA2024-SiC-h-BN hybrid nanocomposites was evaluated at high-temperature environment using pin- on- disc wear testing machine at 30, 100, 200 and 300 °C under an applied load of 10, 20, and 30 N. The aluminium alloy 2024 matrix shows mild to rigorous wear at and above 100 °C under an applied load of 10, 20, and 30 N. AA2024–1.5 wt. % of SiC–2 wt. % of h-BN (H3), and AA2024–2 wt. % of SiC–1.5 wt. % of h-BN (H4) hybrid nanocomposites exhibit severe wear only at a 30 °C chamber temperature environment under an applied load of 30 N. The absence of severe wear phenomena in AA2024-SiC-h-BN hybrid nanocomposites is attributed to the formation of thin lubricant film, oxidation layer, and mechanical mixed layer on the pin surface. Abrasive, adhesive, and fracture wear are the main mode of wear mechanism for AA2024-SiC-h-BN hybrid nanocomposites in a high-temperature environmental chamber at 30, 100, 200 and 300 °C under an applied load of 10, 20, and 30 N.