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Surface Characterization Of The Zn-ni-al_2o_3 Nanocomposite Coating Fabricated Under Ultrasound Condition

机译:超声条件下制备的Zn-ni-al_2o_3纳米复合涂层的表面表征

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Zn-Ni-Al_2O_3 nanocomposite coating, which was fabricated by eletrodeposition technique with the aid of ultrasound, was investigated by scanning electron microscopy (SEM), energy dispersive X-ray (EDX) analysis and X-ray photoelectron spectroscopy (XPS). The results reveal that 7.2 wt.% nano-alumina particles uniformly dispersed in the matrix of the composite coating. The XPS analyses demonstrate that the outermost layer of Zn-Ni-Al_2O_3 coating was composed of nano-alumina and Zn(OH)_2, while the transition layer between the outermost layer and the Zn-Ni matrix consisted of nano-alumina, metallic Zn, ZnO and metallic Ni. In order to investigate the influences of ultrasonic agitation and the incorporation of nano-alumina on the composition and surface structure of Zn-Ni matrix, the comparison studies of Zn-Ni-Al_2O_3 nanocomposite coating with Zn-Ni coatings fabricated with and without ultrasound were conducted. The results indicate that ultrasonic agitation resulted in a decrease of Ni content in the Zn-Ni matrix and an increase of the thickness of surface oxide layer; while the incorporation of nano-α-Al_2O_3 increased the Ni content in the Zn-Ni matrix.
机译:通过扫描电子显微镜(SEM),能量色散X射线(EDX)分析和X射线光电子能谱(XPS)研究了通过超声沉积技术沉积的Zn-Ni-Al_2O_3纳米复合涂层。结果表明,7.2重量%的纳米氧化铝颗粒均匀地分散在复合涂层的基质中。 XPS分析表明,Zn-Ni-Al_2O_3涂层的最外层由纳米氧化铝和Zn(OH)_2组成,而最外层与Zn-Ni基体之间的过渡层由纳米氧化铝,金属锌组成。 ,ZnO和金属Ni。为了研究超声搅拌和纳米氧化铝的掺入对Zn-Ni基体成分和表面结构的影响,比较了采用和不采用超声制备的Zn-Ni涂层的Zn-Ni-Al_2O_3纳米复合涂层的比较研究。进行。结果表明,超声搅拌导致Zn-Ni基体中Ni含量的减少和表面氧化物层厚度的增加。纳米α-Al_2O_3的引入增加了Zn-Ni基体中的Ni含量。

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