Fabrication of TiC-graphene dual-reinforced self-lubricating Al matrix hybrid nanocomposites with superior mechanical and tribological properties. (July 2022)

• Record Type: Journal Article
• Authors: Lin, Fei; Ren, Mengyuan; Wu, Hui; Lu, Yao; Huo, Mingshuai; Yang, Ming; Chen, Zhixin; Jiang, Zhengyi
• Is Part Of: Tribology international. Volume 171(2022)
• Publication Date: 2022-07
• Subjects: Al matrix hybrid nanocomposites -- Microstructure -- Compressive properties -- Wear resistance; Tribology -- Periodicals; 621.89
• DOI: 10.1016/j.triboint.2022.107535
• Languages: English
• ISSNs: 0301-679X

Abstract

Abstract: TiC-graphene dual-reinforced Al matrix hybrid nanocomposites (AMHNs) were synthesised by powder metallurgy. Microstructures, compressive and tribological properties of the AMHNs with different fractions of graphene nanoplatelets (GNPs) were studied and compared with Al2024 alloy, and TiC or GNPs singly reinforced Al composites. The results show the microstructures and distributions of TiC and GNPs are homogenised with the increasing content of GNPs. The compressive properties and wear resistance of the composites are improved efficiently by synergistic influences of TiC and GNPs. Significantly, Al-5.0 wt% TiC-1.0 wt% GNPs has the most superior compressive properties and highest wear resistance with a wear rate of 4.62 × 10 −4 mm 3 /Nm, which is a 94.4% reduction compared with that of unreinforced Al alloy. Highlights: Al2024/TiC/GNPs hybrid nanocomposites were fabricated by powder metallurgy. Distributions of precipitates, TiC and GNPs are improved as GNPs content increases. Mechanical properties of AMHCs are improved with the increasing content of GNPs. Superior wear resistance is obtained for Al2024/5.0 wt% TiC/1.0 wt% GNPs.