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<p>The current work investigates the effect of nano-CeO<sub>2</sub> (nCeO<sub>2</sub>) and graphene nanoplatelet (GNP) reinforcements on the microstructural/mechanical characteristics and sliding wear (ball-on-disk) behavior of HVOF-sprayed Cr<sub>3</sub>C<sub>2</sub>-NiCr coatings. Commercially available Cr<sub>3</sub>C<sub>2</sub>-NiCr feedstock powders were blended with 1 wt.% nCeO<sub>2</sub> and 1 wt.% GNP powders. Advanced characterization was carried out using SEM/EDS, TEM, XRD, Raman Spectroscopy, and optical profilometry. The results reveal that addition of nCeO<sub>2</sub> and GNP to the coatings improved the microhardness and fracture toughness by 28% and 42% and lowered the porosity, COF, and specific wear rate by 69%, 42%, and 24%, respectively. Post-wear analysis reveals the synergistic role played by both nCeO<sub>2</sub> and GNP reinforcements in improving the tribological performance of the coatings.</p>

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Synergistic Effect of Nano-CeO2 and Graphene Nanoplatelet Reinforcements on Characteristics and Wear Behavior of Cr3C2-NiCr Coatings

  • 期刊论文

  • 发表日期：

    2025年10月31日

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  • Sekar Saladi,
  • Hetal R. Chauhan,
  • Ajaykumar Solanki,
  • Sahil Variya,
  • Vishvesh J. Badheka,
  • Satish Tailor,
  • Shrikant Joshi

摘要

The current work investigates the effect of nano-CeO2 (nCeO2) and graphene nanoplatelet (GNP) reinforcements on the microstructural/mechanical characteristics and sliding wear (ball-on-disk) behavior of HVOF-sprayed Cr3C2-NiCr coatings. Commercially available Cr3C2-NiCr feedstock powders were blended with 1 wt.% nCeO2 and 1 wt.% GNP powders. Advanced characterization was carried out using SEM/EDS, TEM, XRD, Raman Spectroscopy, and optical profilometry. The results reveal that addition of nCeO2 and GNP to the coatings improved the microhardness and fracture toughness by 28% and 42% and lowered the porosity, COF, and specific wear rate by 69%, 42%, and 24%, respectively. Post-wear analysis reveals the synergistic role played by both nCeO2 and GNP reinforcements in improving the tribological performance of the coatings.