ZrO2-Doped MAO Coating

Wear cut an order

A MAO coating with ZrO2 nanoparticles incorporated under laser irradiation gains density, uniformity and thickness.

Ye, Wang · Zhengxuan, Hu · Wu, Guolong · Qiandi, Peng · Zhang, Qunli · Jianhua, Yao · Han, Wen · Wen, Chen

Tribology International 2027

Specifications

Porosity

{'zh': '4.67', 'en': '4.67'} %

Volumetric wear rate

{'zh': '3.56 × 10⁻⁵', 'en': '3.56 × 10⁻⁵'} mm³·N⁻¹·m⁻¹

Advantages

Dramatically improved wear resistance

The volumetric wear rate decreased by ~88.3%, nearly one order of magnitude lower than MAO coating, outperforming coatings with only nanoparticle doping or laser assistance.

Significantly reduced porosity

Nanoparticles fill micropores, reducing porosity by ~41.3% compared to MAO coating, resulting in a denser coating.

Enhanced coating adhesion

Laser irradiation promotes uniform coating growth and lower surface roughness, leading to enhanced coating adhesion and improved service reliability.

Elevated hardness

More ZrO₂ nanoparticles enter the coating and stable phases (rutile-TiO₂ and t-ZrO₂) are formed, elevating coating hardness and thus improving anti-wear performance.

Applications

• Wear-resistant coatings：Used to strengthen titanium alloy sliding parts, replacing conventional MAO coatings to drastically reduce wear.
• Ti alloy surface protection：Provides a dense protective layer on titanium alloy substrates, preventing failure from micropore corrosion and wear.
• Aerospace structures：Applied to aerospace titanium alloy parts like landing gear and actuators to extend wear life and improve reliability.
• Implant tribology：Improves the tribological performance of titanium alloy implants at the bone interface, reducing wear debris generation.