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<p>Cost-effective orthopedic implants of 316L SS are good for load bearing applications, but these implants are prone to failure due to poor wear and corrosion resistance compared to titanium implants. Surface modification of 316L SS through composite coating can mitigate these problems. In this study, polyetheretherketone (PEEK) and tantalum pentoxide (Ta<sub>2</sub>O<sub>5</sub>) composite coating was deposited on 316L SS via electrophoretic deposition (EPD) at optimized parameters (applied electric field 10 V/cm with a deposition time of 7&#xa0;min). Scanning electron microscope (SEM) images showed uniform morphology with a heterogeneous distribution of Ta<sub>2</sub>O<sub>5</sub> particles within the PEEK matrix. Fourier transform infrared (FTIR) spectroscopy identified the characteristic peaks of functional groups of PEEK and Ta<sub>2</sub>O<sub>5</sub> and confirmed the successful incorporation of Ta<sub>2</sub>O<sub>5</sub> particles in the composite coating. The presence of Ta<sub>2</sub>O<sub>5</sub> particles in the composite coating tuned the average surface roughness 1.79 ± 0.17 µm and wettability in terms of contact angle 67 ± 3° in the required range for cellular response. The wear studies conducted using pin on disc method demonstrated that composite coating incorporated Ta<sub>2</sub>O<sub>5</sub> particles in PEEK matrix exhibited lower coefficient of friction (COF) and specific wear rate than that of the PEEK coating alone. Electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP) revealed that the Ta<sub>2</sub>O<sub>5</sub> particle incorporation improved the corrosion resistance of composite coating compared to that of the 316L SS and PEEK coating. Thus, the developed composite coating demonstrated suitable properties required for orthopedic implants.</p>

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A study on the effect of tantalum penta oxide incorporation in PEEK-based composite coating: a detailed investigation of wear and corrosion resistance

  • 期刊论文

  • 发表日期：

    2025年4月10日

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  • Adam Khan,
  • Khalil Ahmad,
  • Mian Sami Mudassir,
  • Abdul Wadood,
  • Ehab El Sayed Massoud,
  • Muhammad Amber Fareed,
  • Muhammad Atiq Ur Rehman

摘要

Cost-effective orthopedic implants of 316L SS are good for load bearing applications, but these implants are prone to failure due to poor wear and corrosion resistance compared to titanium implants. Surface modification of 316L SS through composite coating can mitigate these problems. In this study, polyetheretherketone (PEEK) and tantalum pentoxide (Ta2O5) composite coating was deposited on 316L SS via electrophoretic deposition (EPD) at optimized parameters (applied electric field 10 V/cm with a deposition time of 7 min). Scanning electron microscope (SEM) images showed uniform morphology with a heterogeneous distribution of Ta2O5 particles within the PEEK matrix. Fourier transform infrared (FTIR) spectroscopy identified the characteristic peaks of functional groups of PEEK and Ta2O5 and confirmed the successful incorporation of Ta2O5 particles in the composite coating. The presence of Ta2O5 particles in the composite coating tuned the average surface roughness 1.79 ± 0.17 µm and wettability in terms of contact angle 67 ± 3° in the required range for cellular response. The wear studies conducted using pin on disc method demonstrated that composite coating incorporated Ta2O5 particles in PEEK matrix exhibited lower coefficient of friction (COF) and specific wear rate than that of the PEEK coating alone. Electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP) revealed that the Ta2O5 particle incorporation improved the corrosion resistance of composite coating compared to that of the 316L SS and PEEK coating. Thus, the developed composite coating demonstrated suitable properties required for orthopedic implants.