原位微弧氧化法制备了具有较好耐磨损和耐腐蚀性能的Al2O3/LaPxOy/MoS2复合镀层

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science Pub Date : 2025-04-25 DOI:10.1016/j.apsusc.2025.163353

Q. Li, J. Shang, T. Liu

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引用次数: 0

摘要

采用微弧氧化法在6082-T6合金表面原位制备了Al2O3 （P1）、Al2O3/MoS2 （P2）和Al2O3/LaPxOy/MoS2 （P3）复合镀层。与P1涂层相比，在Na2S、Na2MoO4、La (Ac)3溶液中制备的P3涂层的硬度提高了67.60 %，平均摩擦系数降低了42 %，自腐蚀电流最低（4.81 × 10−8 a·cm−2），自腐蚀电位最高（- 0.36 V），自然浸蚀后的质量损失率最低（3.48 × 10−2%）。电解质中的La3+可以在Al2O3/Al2O3界面处原位形成MoS2相，提高了镀层的密度。LaPxOy和MoS2相由于其涂层结构而表现出润滑和抑制作用。本工作旨在原位制备一种同时具有良好耐磨性和耐腐蚀性的微弧氧化复合涂层。

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Al2O3/LaPxOy/MoS2 composite coating with better wear and corrosion resistance in-situ prepared by micro-arc oxidation

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Al2O3/LaPxOy/MoS2 composite coating with better wear and corrosion resistance in-situ prepared by micro-arc oxidation

The Al₂O₃ (P1), Al₂O₃/MoS₂ (P2) and Al₂O₃/LaP_xO_y/MoS₂ (P3) composite coatings were prepared in-situ on the 6082-T6 alloy surface by micro-arc oxidation. Compared with the P1 coating, the P3 coating presented in the electrolyte containing Na₂S, Na₂MoO₄, La (Ac)₃ solution had a 67.60 % increase in hardness, a 42 % reduction in average friction coefficient, the lowest self-corrosion current (4.81 × 10⁻⁸ A·cm⁻²), the highest self-corrosion potential (−0.36 V), and the lowest mass loss rate after natural immersion corrosion (3.48 × 10⁻² %). The La³⁺ in electrolyte can MoS₂ phases are in-situ formed at Al₂O₃/Al₂O₃ interface and the density of the coating is improved. The LaP_xO_y and MoS₂ phases presented a lubricating and inhibiting effect because of their coating structure. This work aims to in-situ prepare a composite coating by micro-arc oxidation with good wear and corrosion resistance simultaneously.

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来源期刊

Applied Surface Science 工程技术-材料科学：膜

CiteScore

12.50

自引率

7.50%

发文量

3393

审稿时长

67 days

期刊介绍： Applied Surface Science covers topics contributing to a better understanding of surfaces, interfaces, nanostructures and their applications. The journal is concerned with scientific research on the atomic and molecular level of material properties determined with specific surface analytical techniques and/or computational methods, as well as the processing of such structures.