Synergistic effect of ultrasound-assisted and ZrO2 nanoparticle sealing on microstructure and mechanical properties of aluminum alloy micro-arc oxidation coating

IF 5.8 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2025-06-01 DOI:10.1016/j.jallcom.2025.181338

Zhenhua Liu , Shuangshuang Zhi , Shubo Li , Zhiqiang Zhu , Ke Dai , Hailin Lu

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引用次数: 0

Abstract

The coating prepared by the conventional micro-arc oxidation (MAO) process usually has a porous structure, which cannot effectively block the invasion of corrosive media, thus reducing corrosion resistance and wear resistance. In this study, composite oxide coatings were prepared on 6061 aluminum alloy by using ultrasound-assisted MAO technology and adding ZrO₂ nanoparticles in phosphate solution. The microstructure and elemental composition of the coating were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS), and the wear resistance and corrosion resistance were tested. The results show that under the synergistic effect of ultrasonic assistance and nanoparticle sealing, the porosity of the composite coating is reduced from 6.35 % of the traditional MAO coating to 2.85 %, the corrosion current density is three orders of magnitude lower than that of the substrate, and it has excellent wear resistance and density. These properties effectively improve the service life of the metal.

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超声辅助与ZrO2纳米颗粒密封对铝合金微弧氧化涂层组织和力学性能的协同效应

常规微弧氧化（MAO）工艺制备的涂层通常具有多孔结构，不能有效阻挡腐蚀介质的侵入，从而降低了耐腐蚀性和耐磨性。本研究采用超声辅助MAO技术，在磷酸盐溶液中加入纳米ZrO2，在6061铝合金表面制备复合氧化物涂层。采用扫描电镜（SEM）、x射线衍射（XRD）、能谱（EDS）和x射线光电子能谱（XPS）对涂层的微观结构和元素组成进行了表征，并对涂层的耐磨性和耐腐蚀性进行了测试。结果表明：在超声辅助和纳米颗粒密封的协同作用下，复合涂层的孔隙率由传统MAO涂层的6.35%降至2.85%，腐蚀电流密度比基体低3个数量级，具有优异的耐磨性和致密性；这些性能有效地提高了金属的使用寿命。

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来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.