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<p>This study investigates the surface modification of hypereutectic Al–Si alloys through electro-explosion deposition of Al-Y₂O₃ coatings, followed by high-energy electron beam irradiation. The electro-explosion process, conducted under varied operational modes, facilitated the formation of adherent Al-Y₂O₃ coatings, resulting in a 1.5-fold enhancement in microhardness and a 1.35-fold reduction in the coefficient of friction relative to the substrate. Microstructural analysis via transmission electron microscopy revealed the formation of Y<sub>3</sub>Al<sub>2</sub> cells with Y<sub>2</sub>Si<sub>2</sub>O<sub>7</sub> interlayers. Subsequent electron beam irradiation induced a refined multiphase submicro/nanocrystalline structure within the surface layer, further improving wear resistance and microhardness. Notably, a fivefold increase in wear resistance was observed for coatings deposited under specific electro-explosion parameters. These results demonstrate the efficacy of combined electro-explosion deposition and electron beam treatment as a viable and cost-effective strategy for significantly enhancing the tribological and mechanical performance of hypereutectic Al–Si alloys, mitigating their inherent limitations.</p>

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Evolution of Microstructure and Mechanical Properties of Electron Beam Irradiated Electro-explosive Al-Y2O3 Coatings

  • 期刊论文

  • 发表日期：

    2025年5月12日

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  • Gudala Suresh,
  • Yulia Shliarova,
  • Vitaly Shlyarov,
  • Dmitrii Zaguliaev,
  • Alexander Prudnikov,
  • Victor Gromov

摘要

This study investigates the surface modification of hypereutectic Al–Si alloys through electro-explosion deposition of Al-Y₂O₃ coatings, followed by high-energy electron beam irradiation. The electro-explosion process, conducted under varied operational modes, facilitated the formation of adherent Al-Y₂O₃ coatings, resulting in a 1.5-fold enhancement in microhardness and a 1.35-fold reduction in the coefficient of friction relative to the substrate. Microstructural analysis via transmission electron microscopy revealed the formation of Y3Al2 cells with Y2Si2O7 interlayers. Subsequent electron beam irradiation induced a refined multiphase submicro/nanocrystalline structure within the surface layer, further improving wear resistance and microhardness. Notably, a fivefold increase in wear resistance was observed for coatings deposited under specific electro-explosion parameters. These results demonstrate the efficacy of combined electro-explosion deposition and electron beam treatment as a viable and cost-effective strategy for significantly enhancing the tribological and mechanical performance of hypereutectic Al–Si alloys, mitigating their inherent limitations.