Surface Modification Of Aluminium By Graphene Nanofiller Impregnation For Rubber-Aluminium Bonding System

Wong, Meng Meng (2019) Surface Modification Of Aluminium By Graphene Nanofiller Impregnation For Rubber-Aluminium Bonding System. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

The aim of this study is to report the demonstration of surface modification technique in fabrication of Aluminium-Graphene Nanoplatelet (Al/GNP) composite utilizing powder metallurgy method assisted by friction stir surfacing. Graphene is one of the carbon nanoparticle that harnessed most of the researcher's interest on top of their extraordinary properties in nature to extract their strength enhancement capability. There were two main stages involved in friction surfacing (FS) method by which the first stage was the fabrication of Al-GNP consumable composite tool with powder metallurgy method and followed by the utilization of tool made to acquire a composite-impregnated Al substrate. The result interpreted from the SEM with EDX spectra analysis showed the metal matrix nanocomposite prepared by friction surfacing had impregnated effectively into Al matrix. Characterization technique of SEM was implemented to study the surface morphology of the surface composite on Al substrate and powder composite tool to see the distribution of reinforcement. Microhardness test was conducted and proved that modifying task with tool of highest 5 wt% GNP composition bring the highest hardness of 24.48±3.85 HV to powder composite. The resulting modified aluminium was brought to adhere with uncured rubber in way of gaining the optimum rubber-metal bond. High graphene composition within the powder composite had proved to increase the maximum peeling force between rubber and metal during bond peel test by obtaining 9.54 kJ/m2 nominal peeling energy as compare to Al substrate with lowest GNP composition (8.52 kJ/m2) and the unmodified Al (5.85 kJ/m2).

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