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<p>Looking at the demand of advanced anticorrosive materials, the present research focuses on enhancing the efficiency of MgAZ31b in corrosive conditions by applying coatings. This study focuses on fabricating a micro-HEA tool through powder metallurgy technique and utilizing it in the EDC process to deposit the (CoCuFeMn)90Ti5Al5 HEA coatings. The results of XRD confirm that the coatings consist of dual phase that is BCC and FCC in the coatings. Tribological outcomes reveal that the (CoCuFeMn)90Ti5Al5 HEA film remarkably enhances resistance to wear and corrosion of MgAZ31B substrate. Among the various specimens, the coating applied at an optimal pulse discharge duration (Ton = 400&#xa0;µs) proved to be the most effective, exhibiting the minimum penetration rate of corrosion, i.e., 10&#xa0;mm/year when studied through electrochemical impedance spectroscopy (EIS), in contrast to the bare non-deposited magnesium reference substrate 97.48%. Contact angle measurements in simulated body fluid revealed improved surface wettability, with a 37.8% decrease in contact angle indicating enhanced hydrophilicity. Additionally, wear tests demonstrate highly promising outcomes, with coated surfaces showing an 88% enhancement in wear rate and a significant reduction in tribological risks, making them more suitable for implant applications. The hydrophilicity of the HEA coating may be beneficial for different bodily activities, especially in protein actions. Therefore, the use of HEA coatings on MgAZ31b shows great potential for enhancing their corrosion resistance and making them appropriate for applications in medical implants.</p>

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Fabrication of CoCuFeMnTiAl High Entropy Alloy Coating by Micro-electrical Discharge Process on MgAZ31B for Implant Applications

  • 期刊论文

  • 发表日期：

    2025年9月8日

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  • Rashi Tyagi,
  • Vivek Sharma,
  • Nitesh Kumar,
  • Anchal Sharma,
  • Sunil Kumar Tiwari

摘要

Looking at the demand of advanced anticorrosive materials, the present research focuses on enhancing the efficiency of MgAZ31b in corrosive conditions by applying coatings. This study focuses on fabricating a micro-HEA tool through powder metallurgy technique and utilizing it in the EDC process to deposit the (CoCuFeMn)90Ti5Al5 HEA coatings. The results of XRD confirm that the coatings consist of dual phase that is BCC and FCC in the coatings. Tribological outcomes reveal that the (CoCuFeMn)90Ti5Al5 HEA film remarkably enhances resistance to wear and corrosion of MgAZ31B substrate. Among the various specimens, the coating applied at an optimal pulse discharge duration (Ton = 400 µs) proved to be the most effective, exhibiting the minimum penetration rate of corrosion, i.e., 10 mm/year when studied through electrochemical impedance spectroscopy (EIS), in contrast to the bare non-deposited magnesium reference substrate 97.48%. Contact angle measurements in simulated body fluid revealed improved surface wettability, with a 37.8% decrease in contact angle indicating enhanced hydrophilicity. Additionally, wear tests demonstrate highly promising outcomes, with coated surfaces showing an 88% enhancement in wear rate and a significant reduction in tribological risks, making them more suitable for implant applications. The hydrophilicity of the HEA coating may be beneficial for different bodily activities, especially in protein actions. Therefore, the use of HEA coatings on MgAZ31b shows great potential for enhancing their corrosion resistance and making them appropriate for applications in medical implants.