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<p>This study investigates the tribological and mechanical properties of aluminium matrix composites (AMCs) reinforced with copper chromate (Cu₂Cr₂O₅) nanoparticles, presenting a novel approach to utilizing Cu₂Cr₂O₅ as a reinforcing phase in AA6018 composites fabricated via plasma arc processing. This is the first comprehensive work demonstrating the formation of a nanoscale eutectic structure that significantly enhances tribological performance by refining the microstructure and facilitating a stable lubricating film, thereby reducing wear and friction. The composites were developed with Cu₂Cr₂O₅ weight percentages ranging from 1 to 3 wt%. The results indicated that 2.5 wt% reinforcement achieved optimal performance, offering the lowest wear rate and friction coefficient due to forming a solid lubricating film. The hardness of the composites increased by 41.3%, with a peak value of 520 HV for 3 wt%, while excessive reinforcement led to particle detachment and reduced effectiveness under high loads. These findings underline the potential of Cu₂Cr₂O₅-reinforced AMCs for advanced aerospace and automotive applications, offering superior wear resistance and mechanical strength.</p>

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Enhanced tribological performance of AA6018 aluminium composites reinforced with copper chromate exploring ceramic-based strengthening mechanisms

  • 期刊论文

  • 发表日期：

    2025年5月26日

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  • Natrayan Lakshmaiya,
  • V. Swamy Nadh,
  • Seeniappan Kaliappan,
  • G. Muthu,
  • Nimel Sworna Ross,
  • Ramya Maranan

摘要

This study investigates the tribological and mechanical properties of aluminium matrix composites (AMCs) reinforced with copper chromate (Cu₂Cr₂O₅) nanoparticles, presenting a novel approach to utilizing Cu₂Cr₂O₅ as a reinforcing phase in AA6018 composites fabricated via plasma arc processing. This is the first comprehensive work demonstrating the formation of a nanoscale eutectic structure that significantly enhances tribological performance by refining the microstructure and facilitating a stable lubricating film, thereby reducing wear and friction. The composites were developed with Cu₂Cr₂O₅ weight percentages ranging from 1 to 3 wt%. The results indicated that 2.5 wt% reinforcement achieved optimal performance, offering the lowest wear rate and friction coefficient due to forming a solid lubricating film. The hardness of the composites increased by 41.3%, with a peak value of 520 HV for 3 wt%, while excessive reinforcement led to particle detachment and reduced effectiveness under high loads. These findings underline the potential of Cu₂Cr₂O₅-reinforced AMCs for advanced aerospace and automotive applications, offering superior wear resistance and mechanical strength.