The micro-arc oxidation technology is employed to prepare an Al₂O₃/TiO₂ composite coating on pure titanium with Al particles addition into electrolyte. The surface morphology of micro-arc oxidation composite coating is investigated by Quant 200 SEM. The properties of Al₂O₃/TiO₂ composite coating are investigated in terms of the hardness and abrasion resistance of micro-arc oxidation with different Al particle concentrations. The results show that micro-arc oxidation technology can be introduced to prepare Al₂O₃/TiO₂ composite coating. The addition of Al particle into the electrolyte can improve the compactness, abrasion resistance and hardness of micro-arc oxidation composite coating. The termination voltage of micro oxidation increases from 460 V to 515 V, the hardness increases from 811 HV to 1232 HV, the average friction coefficient decreases from 0.68 to 0.57, and the wear weightlessness reduces from 1.0 mg to 0.58 mg when the content of Al particles is 3 g/L.

micro-arc oxidation  /  nano-Al particles  /  Al₂O₃/TiO₂ oxidation coating