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<p>Ti<sub>3</sub>AlC<sub>2</sub>, a typical MAX phase ceramic, possesses a unique combination of metallic and ceramic properties, making it an ideal candidate for anti-corrosion fillers. In this study, Ti<sub>3</sub>AlC<sub>2</sub>/epoxy composite coatings were fabricated using a cold spray method. To optimize the dispersion and filler size, raw Ti<sub>3</sub>AlC<sub>2</sub> powders were refined via high-energy ball milling. The influence of milling parameters-time, speed, and ball-to-material ratio-on the phase composition, microstructure, and electrochemical corrosion behavior was systematically investigated. Results indicate that increasing the ball-to-material ratio and milling speed significantly refines the particle size without inducing phase decomposition. The optimal coating, prepared with a 20:1 ratio at 400&#xa0;rpm for 10&#xa0;h, exhibited the highest low-frequency impedance modulus of 6.15 × 10<sup>5</sup> Ω·cm<sup>2</sup>. The enhanced electrochemical barrier performance is attributed to the "labyrinth effect," where refined sub-micron Ti<sub>3</sub>AlC<sub>2</sub> particles effectively seal the micropores in the resin matrix and prolong the diffusion path of corrosive ions.</p>

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Effect of high-energy ball milling on corrosion resistance of Ti3AlC2/resin composite coating

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年4月14日

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  • Bo Gao,
  • Wenqiang Hu,
  • Xingyue Yong,
  • Weimin Xu,
  • Denghui Xia,
  • Haozheng Han

摘要

Ti3AlC2, a typical MAX phase ceramic, possesses a unique combination of metallic and ceramic properties, making it an ideal candidate for anti-corrosion fillers. In this study, Ti3AlC2/epoxy composite coatings were fabricated using a cold spray method. To optimize the dispersion and filler size, raw Ti3AlC2 powders were refined via high-energy ball milling. The influence of milling parameters-time, speed, and ball-to-material ratio-on the phase composition, microstructure, and electrochemical corrosion behavior was systematically investigated. Results indicate that increasing the ball-to-material ratio and milling speed significantly refines the particle size without inducing phase decomposition. The optimal coating, prepared with a 20:1 ratio at 400 rpm for 10 h, exhibited the highest low-frequency impedance modulus of 6.15 × 105 Ω·cm2. The enhanced electrochemical barrier performance is attributed to the "labyrinth effect," where refined sub-micron Ti3AlC2 particles effectively seal the micropores in the resin matrix and prolong the diffusion path of corrosive ions.