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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Evolution process of the plasma electrolytic oxidation (PEO) coating formed on aluminum in an alkaline sodium hexametaphosphate ((NaPO3)(6)) electrolyte
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Evolution process of the plasma electrolytic oxidation (PEO) coating formed on aluminum in an alkaline sodium hexametaphosphate ((NaPO3)(6)) electrolyte

机译:在碱性六偏磷酸钠((NaPO3)(6))电解质中铝上形成的等离子体电解氧化(PEO)涂层的进化过程

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A plasma electrolytic oxidation (PEO) coating was fabricated on AA1060 alloy in an alkaline sodium hexametaphosphate ((NaPO3)(6)) electrolyte. The growth characteristic of the PEO coating was investigated by means of a substrate-detachment technique, Scanning electron microscope (SEM) equipped with energy dispersive spectrometry (EDS), X-ray photoelectron spectrometer (XPS), X-ray diffractometer (XRD) and Mott-Schottky analysis. The results showed that an ordered and porous anodic aluminum oxide (AAO) film was formed at the anodic oxidation stage by the influence of (NaPO3)(6) in the electrolyte, and the microstructure of the AAO film induced the plasma discharge events to initiate inside the AAO film. The Mott-Schottky analysis showed that the PEO coated samples were all represented n-type semiconducting behavior. The microstructures of detached coatings showed that the coating/substrate interfaces formed at the anodic oxidation stage and sparking stage consist of numerous hemispherical cap structures, but with different sizes. It was also revealed that the inward growth of the hemispherical cap structures is dependent on the diffusion of oxygen from the electrolyte or plasma gases to substrate, and P atoms mainly exist in the amorphous phase of the PEO coating. (C) 2019 Elsevier B.V. All rights reserved.
机译:在碱性六偏磷酸盐((NaPO3)(6))电解质中,在AA1060合金上制造等离子体电解氧化(PEO)涂层。通过衬底 - 脱离技术,扫描电子显微镜(SEM),扫描电子显微镜(EDS),X射线光电子能谱仪(XPS),X射线衍射仪(XRD)和X射线衍射仪(XRD)和Mott-肖特基分析。结果表明,通过电解质中的(NaPO 3)(6)的影响,在阳极氧化阶段形成有序和多孔阳极氧化铝(AAO)膜,并且AaO膜的微观结构诱导血浆放电事件启动在Aao薄膜里面。 Mott-Schottky分析表明,PEO涂覆的样品全部代表N型半导体行为。拆卸涂层的微观结构表明,在阳极氧化阶段和火花级形成的涂层/基板界面由许多半球形帽结构组成,但具有不同的尺寸。还透露,半球形帽结构的内向生长取决于氧气从电解质或等离子体气体扩散到基底上,P原子主要存在于PEO涂层的非晶相中。 (c)2019 Elsevier B.v.保留所有权利。

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