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<p>To improve the abrasion resistance of TC4 (Ti-6Al-4V) titanium alloy components, TiN/TiO<sub>2</sub> composite ceramic coating was prepared on the surface of TC4 titanium alloy by introducing titanium nitride (TiN) particles into the silicate-phosphoric acid composite electrolyte system using the micro-arc oxidation (MAO) technique. The surface morphology, phase composition, and roughness of the coating were analyzed by SEM, an x-ray diffractometer, and a handheld roughness instrument, respectively. The abrasion resistance of the coating prepared by the TiN additive was analyzed by a friction abrasion tester. These results demonstrate that the coatings formed in the electrolyte consist primarily of rutile-TiO<sub>2</sub> phase and anatase-TiO<sub>2</sub> phase with a dense structure. During the MAO process, TiN successfully penetrates the coating and reduces the average size and porosity of the pores by filling the micropores on the coating surface by mechanical agitation and electrophoresis. The MAO coatings achieved their highest thickness and hardness when 3&#xa0;g/L TiN particles were added, as well as a 43% reduction in the coefficient of friction when compared to the titanium alloy substrate and a relatively lower abrasion width of the coating that has good wear.</p>

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Study on the Wear Resistance of TiN/TiO2 Micro-arc Oxidized Composite Coating on TC4 Titanium Alloy

  • 期刊论文

  • 发表日期：

    2025年3月17日

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  • Xiaowen Chen,
  • Wanlin Xie,
  • Ling Wang,
  • Song Tang,
  • Defen Zhang

摘要

To improve the abrasion resistance of TC4 (Ti-6Al-4V) titanium alloy components, TiN/TiO2 composite ceramic coating was prepared on the surface of TC4 titanium alloy by introducing titanium nitride (TiN) particles into the silicate-phosphoric acid composite electrolyte system using the micro-arc oxidation (MAO) technique. The surface morphology, phase composition, and roughness of the coating were analyzed by SEM, an x-ray diffractometer, and a handheld roughness instrument, respectively. The abrasion resistance of the coating prepared by the TiN additive was analyzed by a friction abrasion tester. These results demonstrate that the coatings formed in the electrolyte consist primarily of rutile-TiO2 phase and anatase-TiO2 phase with a dense structure. During the MAO process, TiN successfully penetrates the coating and reduces the average size and porosity of the pores by filling the micropores on the coating surface by mechanical agitation and electrophoresis. The MAO coatings achieved their highest thickness and hardness when 3 g/L TiN particles were added, as well as a 43% reduction in the coefficient of friction when compared to the titanium alloy substrate and a relatively lower abrasion width of the coating that has good wear.