一步微弧氧化原位制备Al2O3-CePO4-MoS2复合材料层的显微组织、磨损和腐蚀行为

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology Pub Date : 2025-04-22 DOI:10.1016/j.surfcoat.2025.132206

Q. Li, J. Shang

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引用次数: 0

摘要

采用微弧氧化技术在6082-T6合金表面原位制备了Al2O3-CePO4-MoS2复合层。研究了Ce3+浓度对三元层微观组织、磨损和腐蚀行为的影响。结果表明，当电解液中Ce3+浓度为7.5 g/L时，最高硬度为961.79 HV1，摩擦系数为0.56，磨损率为4.9 × 10-7 mm3/N·mm，自腐蚀电流密度降低了一个数量级，腐蚀坑明显减小。Al2O3-CePO4-MoS2层的耐磨损和耐腐蚀性能优于Al2O3-MoS2层。原位形成的结晶或非晶态CePO4和MoS2在Al2O3周围形成，并具有协同作用，提高了材料的致密性、硬度、耐磨性和耐腐蚀性。这种Al2O3-CePO4-MoS2复合层可用于在雨天环境中保护触点系统。

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Microstructure, wear, and corrosion behavior of an Al2O3-CePO4-MoS2 composite layer in-situ prepared by one-step micro arc-oxidation

The Al₂O₃-CePO₄-MoS₂ composite layer was in-situ prepared on the surface of 6082-T6 alloy by micro-arc oxidation technology. The effects of Ce³⁺ concentrations on microstructure, wear and corrosion behavior of the ternary layer were studied. The results showed that when the Ce³⁺ concentrations in electrolyte was 7.5 g/L, the highest hardness was 961.79 HV₁, the friction coefficient was 0.56 and wear rate was 4.9 × 10^-7 mm³/N·mm, the self-corrosion current density was reduced by one order of magnitude, and the corrosion pit was significantly reduced. The wear and corrosion resistance of the Al₂O₃-CePO₄-MoS₂ layer is better than that of Al₂O₃-MoS₂ layer. The crystalline or amorphous CePO₄ and MoS₂ formed in-situ were presented around the Al₂O₃ and had synergistic effects for improving the compactness, hardness, wear, and corrosion resistance. This Al₂O₃-CePO₄-MoS₂ composite layer can be used for protection in contact systems in rainy environments.

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来源期刊

Surface & Coatings Technology 工程技术-材料科学：膜

CiteScore

10.00

自引率

11.10%

发文量

921

审稿时长

19 days

期刊介绍： Surface and Coatings Technology is an international archival journal publishing scientific papers on significant developments in surface and interface engineering to modify and improve the surface properties of materials for protection in demanding contact conditions or aggressive environments, or for enhanced functional performance. Contributions range from original scientific articles concerned with fundamental and applied aspects of research or direct applications of metallic, inorganic, organic and composite coatings, to invited reviews of current technology in specific areas. Papers submitted to this journal are expected to be in line with the following aspects in processes, and properties/performance: A. Processes: Physical and chemical vapour deposition techniques, thermal and plasma spraying, surface modification by directed energy techniques such as ion, electron and laser beams, thermo-chemical treatment, wet chemical and electrochemical processes such as plating, sol-gel coating, anodization, plasma electrolytic oxidation, etc., but excluding painting. B. Properties/performance: friction performance, wear resistance (e.g., abrasion, erosion, fretting, etc), corrosion and oxidation resistance, thermal protection, diffusion resistance, hydrophilicity/hydrophobicity, and properties relevant to smart materials behaviour and enhanced multifunctional performance for environmental, energy and medical applications, but excluding device aspects.