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<p>This study explores the development of lightweight, environmentally sustainable aluminum matrix hybrid nanocomposites reinforced with nano-silicon carbide (nSiC) and nano-eggshell (ES) particles, fabricated via the powder metallurgy method. Aluminum 2024 alloy (AA2024), widely used in aerospace and automotive industries, is known for its high strength but suffers from poor wear resistance. To address this, nano-SiC (1-4 wt.%) and a fixed concentration of nano-eggshell (2 wt.%) were incorporated into the alloy matrix. Microstructural analysis using optical microscopy revealed significant grain refinement with the addition of the nano-reinforcements. Mechanical testing showed that incorporation of 4 wt.% nSiC resulted in a 37% increase in hardness compared to the base alloy, while hybrid nanocomposites containing 4 wt.% nSiC and 2 wt.% ES exhibited a 47% improvement. Additionally, the hybrid nanocomposite demonstrated a 19% enhancement in compressive strength and a significant reduced wear rate, attributed to the self-lubricating properties of the eggshell particles. Scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS) confirmed uniform dispersion of the reinforcements, contributing to improved mechanical and wear performance. These findings suggested that the hybrid nanocomposites offer superior functional properties for structural applications, while promoting sustainable use of waste materials like eggshell.</p>

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Morphology and Properties of Aluminium Alloy Matrix Hybrid Nanocomposites Reinforced with Nano-SiC and Eggshell Particles

  • 期刊论文

  • 发表日期：

    2025年2月26日

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  • Subhajit Chattopadhyay,
  • Subrata Mondal,
  • Debi Prasad Mishra

摘要

This study explores the development of lightweight, environmentally sustainable aluminum matrix hybrid nanocomposites reinforced with nano-silicon carbide (nSiC) and nano-eggshell (ES) particles, fabricated via the powder metallurgy method. Aluminum 2024 alloy (AA2024), widely used in aerospace and automotive industries, is known for its high strength but suffers from poor wear resistance. To address this, nano-SiC (1-4 wt.%) and a fixed concentration of nano-eggshell (2 wt.%) were incorporated into the alloy matrix. Microstructural analysis using optical microscopy revealed significant grain refinement with the addition of the nano-reinforcements. Mechanical testing showed that incorporation of 4 wt.% nSiC resulted in a 37% increase in hardness compared to the base alloy, while hybrid nanocomposites containing 4 wt.% nSiC and 2 wt.% ES exhibited a 47% improvement. Additionally, the hybrid nanocomposite demonstrated a 19% enhancement in compressive strength and a significant reduced wear rate, attributed to the self-lubricating properties of the eggshell particles. Scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS) confirmed uniform dispersion of the reinforcements, contributing to improved mechanical and wear performance. These findings suggested that the hybrid nanocomposites offer superior functional properties for structural applications, while promoting sustainable use of waste materials like eggshell.