Influence of Graphene Nanoplatelets on Mechanical Properties and Adhesive Wear Performance of Epoxy-Based Composites

Eayal Awwad, K. Y. and Yousif, B. F. ORCID: https://orcid.org/0000-0003-3847-5469 and Fallahnezhad, Khosro and Saleh, Khalid and Zeng, Xuesen (2020) Influence of Graphene Nanoplatelets on Mechanical Properties and Adhesive Wear Performance of Epoxy-Based Composites. Friction. pp. 1-36. ISSN 2223-7690


Abstract

Epoxy resin is one of the most widely used thermoset polymers in high-performance composite materials for lightweight applications. However, epoxy has a high coefficient of friction, which limits its tribological applications. In this study, the effect was investigated of different weight fractions of solid lubricant graphene nanoplatelets (GNPs), ranging from 0 wt. % to 4.5 wt. %, on mechanical and adhesive wear performance of epoxy. Adhesive wear tests covered mild and severe wear regimes. The correlation of tribological and mechanical properties was studied as well. scanning electron microscope (SEM) was used to observe the failure mechanisms for both tribological and mechanical samples after each test. The results revealed that the addition of GNPs to the epoxy improved its stiffness and hardness but reduced its fracture strength and toughness. Adhesive wear performance exhibited high efficiency with GNP additions and showed reductions in the specific wear rate, the coefficient of friction and the induced interface temperature by 76%, 37% and 22%, respectively. A fatigue wear mechanism was predominant as the applied load increased. Most importantly, severe wear signs occurred when the interface temperature reached the heat distortion temperature of the epoxy. The tribological and mechanical properties showed only a weak correlation to each other. The addition of GNPs to epoxy by less than 4.5 wt. % was highly efficient to improve the wear performance while maintaining the fracture strength and toughness. FTIR analysis shows no chemical interaction between the epoxy matrix with GNPs, which implies its physical interaction.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering (1 Jul 2013 -)
Date Deposited: 26 Oct 2020 04:14
Last Modified: 26 Oct 2020 04:24
Uncontrolled Keywords: Graphene nanoplatelets; Epoxy; Adhesive wear; Solid lubricants
Fields of Research (2008): 09 Engineering > 0913 Mechanical Engineering > 091309 Tribology
09 Engineering > 0913 Mechanical Engineering > 091308 Solid Mechanics
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970110 Expanding Knowledge in Technology
Identification Number or DOI: https://doi.org/10.1007/s40544-020-0453-5
URI: http://eprints.usq.edu.au/id/eprint/39966

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