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<p>The widespread industrial use of aluminum is often limited by its inherent low strength and poor wear resistance, especially at elevated temperatures. To address these shortcomings, this study investigates the integration of a novel binary hybrid nanofiller comprising equal-weight percentage graphite nanoplatelets (GnP) and hexagonal boron nitride (hBN) into an aluminum matrix. This tailored approach leverages the synergistic combination of mechanical and solid lubricant features of both GnP and hBN. In the present study, aluminum (Al)-based hybrid nanocomposites were developed by powder metallurgy technique using binary hybrid nanofillers consisting of GnP and 20&#xa0;h milled hBN as nanofillers. The synergistic impact of the GnP-hBN binary hybrid nanofiller on the microstructure, mechanical, and tribological properties of the Al-based hybrid nanocomposites has been studied. Morphological analysis via scanning electron microscopy, high-resolution transmission electron microscopy, and x-ray diffraction confirmed the structural integrity of both GnP and hBN, with minimal damage after ball milling. Optimal nanofiller dispersion was observed at 1 wt.%, leading to the highest relative density (93.12%) and hardness (649.52&#xa0;MPa). Higher filler concentrations led to agglomeration, reducing mechanical properties and wear resistance. The Al-1 wt.% G<sub>50</sub>B<sub>50</sub> nanocomposite exhibited superior wear resistance with a minimum wear track width of 1.30&#xa0;mm, whereas higher filler content increased agglomeration and porosity. Compression tests revealed the highest compressive strength of 569.89&#xa0;MPa at 1 wt.% filler content, while higher filler concentrations led to a reduction in compressive strength. Overall, 1 wt.% G<sub>50</sub>B<sub>50</sub> was found to be the optimal filler concentration for enhancing the&#xa0;mechanical and tribological properties. The study underscores the promise of binary nanofiller systems in overcoming limitations of mono-filler composites. It demonstrates their potential in high-performance, wear-resistant applications in the aerospace and automotive sectors.</p>

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Enhancing Mechanical and Tribological Properties of Al-based Nanocomposites via Equal-Weight-Ratio Graphite Nanoplatelet and Hexagonal Boron Nitride Hybrid Nanofillers

  • 期刊论文

  • 发表日期：

    2025年10月6日

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  • Arka Ghosh,
  • Syed Nasimul Alam,
  • Ghananshu Patil,
  • Parth Patel,
  • Vidhi Sachan,
  • Nazrul Haq,
  • Asiful H. Seikh

摘要

The widespread industrial use of aluminum is often limited by its inherent low strength and poor wear resistance, especially at elevated temperatures. To address these shortcomings, this study investigates the integration of a novel binary hybrid nanofiller comprising equal-weight percentage graphite nanoplatelets (GnP) and hexagonal boron nitride (hBN) into an aluminum matrix. This tailored approach leverages the synergistic combination of mechanical and solid lubricant features of both GnP and hBN. In the present study, aluminum (Al)-based hybrid nanocomposites were developed by powder metallurgy technique using binary hybrid nanofillers consisting of GnP and 20 h milled hBN as nanofillers. The synergistic impact of the GnP-hBN binary hybrid nanofiller on the microstructure, mechanical, and tribological properties of the Al-based hybrid nanocomposites has been studied. Morphological analysis via scanning electron microscopy, high-resolution transmission electron microscopy, and x-ray diffraction confirmed the structural integrity of both GnP and hBN, with minimal damage after ball milling. Optimal nanofiller dispersion was observed at 1 wt.%, leading to the highest relative density (93.12%) and hardness (649.52 MPa). Higher filler concentrations led to agglomeration, reducing mechanical properties and wear resistance. The Al-1 wt.% G50B50 nanocomposite exhibited superior wear resistance with a minimum wear track width of 1.30 mm, whereas higher filler content increased agglomeration and porosity. Compression tests revealed the highest compressive strength of 569.89 MPa at 1 wt.% filler content, while higher filler concentrations led to a reduction in compressive strength. Overall, 1 wt.% G50B50 was found to be the optimal filler concentration for enhancing the mechanical and tribological properties. The study underscores the promise of binary nanofiller systems in overcoming limitations of mono-filler composites. It demonstrates their potential in high-performance, wear-resistant applications in the aerospace and automotive sectors.