The present work explores the mechanical and corrosion resistance properties of Al₂O₃-13wt% TiO₂ (AT13) and hydroxyapatite (HAP) bilayer coated titanium alloy (Ti-6Al-4V) bioimplants. Plasma spray coated AT13 acts as the foundation layer (thickness 75 μm) and HAP acts as the top layer (thickness 75 μm). AT13/HAP bilayer coated Ti-6Al-4V implants were characterized in terms of microstructure, chemical composition, hardness and surface roughness. The corrosion resistance and bioactivity were investigated in simulated body fluid (SBF) environment at 37 °C. The results validated that bilayer coated Ti-6Al-4V implants possessed superior corrosion resistance, polarization resistance and microhardness in comparison with monolayer coated and uncoated implants.

本工作探讨了Al ₂ O ₃ -13wt％TiO ₂（AT13）和羟基磷灰石（HAP）双层涂层钛合金（Ti-6Al-4V）生物植入物的机械性能和耐腐蚀性。等离子喷涂AT13用作基础层（厚度为75μm），HAP用作顶层（厚度为75μm）。AT13 / HAP双层涂覆的Ti-6Al-4V植入物通过微观结构，化学成分，硬度和表面粗糙度进行了表征。在37°C的模拟体液（SBF）环境中研究了耐腐蚀性和生物活性。结果证实，与单层涂覆和未涂覆的植入物相比，双层涂覆的Ti-6Al-4V植入物具有优异的耐蚀性，抗极化性和显微硬度。