The Mechanical, Thermal, and Electrical Properties of Nanographene-Aluminum Metal Matrix Composites are Exploited to Create Shielding Materials.

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Romalarajesh, V.V.S. Prasad, Maduthuri Venkatesh, P Surya Nagendra , M.V.Krishna Mohan

Abstract

The objective of this work is to examine the alterations in mechanical and thermodynamic characteristics resulting from the addition of multiwall nanographene as a filler into an aluminium (Al) matrix. The compositions and morphologies of nanocomposites were characterised using scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDAX). The range spanned from S1, which consisted of 100% AL, 0% Cu, and 0% Nano Graphene, to S4, which consisted of 73% AL, 21% Cu, and 6% Nano Graphene. Subsequently, and assessed the thermal stability of the composites by employing differential thermal analysis (DTA) and thermogravimetric analysis (TGA). The impact of nanographene on the physical and chemical characteristics of Al-copper-nanographene composites were investigated. These findings indicate that nanographene enhances the thermal properties of the composites, resulting in increased thermal resistance compared to pure aluminium. Notably, S3, in particular, exhibits a 5-fold improvement in weight retention properties. An electrical conductivity measurement was performed using a CDE ResMap 178 4-Point Probe. By taking the average of five distinct measurements, we determined the final value for electrical conductivity, which indicated a 40% rise in s4 electrical conductivity. Mechanical tests, including as tensile, hardness, wear, and flexural tests, provide insights into the possible applications of composites in the aerospace, transportation, and maritime sectors. The optimal values for tensile and hardness are S4, for wear are S3, and for flexural are S2.

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