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The Effect of Graphene Nanoplatelets Content on the Hardness of Mg6%Zn0.2%Mn Composites

Abang Mohamad Harith Abang Beniamin, Noor Hisyam Noor Mohamed and Mahsuri Yusof

Pertanika Journal of Science & Technology, Volume 31, Issue 3, April 2023

DOI: https://doi.org/10.47836/pjst.31.3.20

Keywords: Graphene nanoplatelets, magnesium-based composites, microhardness test, powder metallurgy

Published on: 7 April 2023

The effect of graphene nanoplatelets (GNPs) content on the hardness of magnesium-based composites was studied. A magnesium-based composite, Mg6%Zn0.2%Mn with graphene nanoplatelets (GNPs), was fabricated via powder metallurgy process at room temperature and compressive pressures of 50kN for 20 minutes, which was then sintered at 500°C for 2 hours. It produced significant grain refinement microstructure. The change in microstructure was examined by 3D microscope analysis, and the hardness value was evaluated using the Vickers microhardness apparatus. This study demonstrated the importance of GNPs reinforcement with zinc and manganese for microhardness analysis in the sintered Mg-based GNPs composites. It also portrayed their influence on grain refinement of the microstructure. The hardness results agreed with the microstructure results, proving that the presence of GNPs increases the hardness of the Mg-based composites.

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ISSN 0128-7680

e-ISSN 2231-8526

Article ID

JST-3809-2022

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