Abstract

It has been confirmed in the present work that the components of an electrolyte and impregnating solution accumulated in pores can serve as a material for the microcrystal formation on the surface of oxide layers at high-temperature oxidative annealing. WO₃ microcrystals were formed in the pores and along the pore perimeter of coatings formed by the method of plasma-electrolytic oxidation (PEO) in aqueous solutions with Na₂WO₄. Hemispheres containing NiWO₄ nanogranules occluded the coating pores after their additional impregnation with an aqueous solution Ni(NO₃)₂ and annealing. The pore content has been analyzed, and possible mechanisms for its transformation into microcrystals and hemispheres have been considered. The obtained results were important for determination of the methods of targeted change in the composition and architecture of the complex oxide coatings' surface and, consequently, for controlling their functional properties.

中文翻译：

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电解质和浸渍溶液对钛上含钨PEO涂层氧化退火表面微晶生长的影响

摘要

在本工作中已经证实，聚集在孔中的电解质和浸渍溶液的成分可以用作在高温氧化退火中在氧化物层的表面上形成微晶的材料。在具有Na ₂ WO _4的水溶液中，通过等离子体电解氧化（PEO）方法形成的涂层在孔中并沿着孔的周长形成WO ₃微晶。含有NiWO ₄纳米颗粒的半球在用水溶液Ni（NO ₃）₂额外浸渍后堵塞了涂层孔。和退火。分析了孔的含量，并考虑了其转变为微晶和半球的可能机理。获得的结果对于确定复合氧化物涂层表面的组成和结构的目标变化方法以及因此控制其功能性质具有重要意义。