Structure and electrical potential of calcium phosphate coatings modified with aluminum oxyhydroxide nanoparticles

IF 0.8 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Letters on Materials Pub Date : 2022-12-01 DOI:10.22226/2410-3535-2022-4-336-342

V. Chebodaeva, M. Sedelnikova, A. Kashin, O. Bakina, I. Khlusov, A. Zharin, V. Egorkin, I. Vyaliy, Y. Sharkeev

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引用次数: 2

Abstract

The effect of the introduction of charged aluminum oxyhydroxide (AO) nanoparticles into the porous coatings from calcium phosphate formed by micro-arc oxidation on their electrical potential and structure was studied. The modification resulted in changes in the morphology and elemental composition of the coatings. The selection of coating functionalization parameters resulted in obtaining homogeneously distributed aluminum oxyhydroxide nanoparticles in the form of agglomerates, providing the maximum change in the electrical potential of the coatings. An increase in the duration of ultrasonic dispersion (USD) of initial AlN powder suspension from 10 to 60 min and an increase in the surface roughness of the coatings, parameter R a , from 3.5 to 5.5 µm led to an increase in the surface electrical potential from −85 to −35 mV. At the same time, the aluminum content in the coating decreased from 3 to 1 at.% with an increase in the duration of USD of the AlN powder suspension from 10 to 60 minutes. The introduction of aluminum oxyhydroxide nanoparticles into the coating contributed to an improvement in corrosion properties, namely, an increase in the corrosion potential from 0.1 to 0.2 mV and a decrease in the corrosion current from 2.5 ∙10 −9 to 1.1·10 −9 A ∙ cm 2 .

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氢氧化铝纳米颗粒改性磷酸钙涂层的结构和电势

研究了在由微弧氧化形成的磷酸钙多孔涂层中引入带电的氢氧化铝（AO）纳米颗粒对其电势和结构的影响。改性导致涂层的形态和元素组成发生变化。涂层功能化参数的选择导致获得团聚物形式的均匀分布的氢氧化铝纳米颗粒，从而提供涂层电势的最大变化。初始AlN粉末悬浮液的超声分散持续时间（USD）从10分钟增加到60分钟，涂层的表面粗糙度（参数Ra）从3.5µm增加到5.5µm，导致表面电势从−85 mV增加到−35 mV。同时，涂层中的铝含量随着AlN粉末悬浮液的USD持续时间从10分钟增加到60分钟而从3原子%降低到1原子%。在涂层中引入氢氧化铝纳米颗粒有助于改善腐蚀性能，即腐蚀电位从0.1 mV增加到0.2 mV，腐蚀电流从2.5∙10−9减少到1.1·10−9 a∙cm 2。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Letters on Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

1.60

自引率

14.30%

发文量

期刊介绍： The aim of "Letters on materials" is to provide a fast publication of short research and review articles on various topics in materials science and related areas of material physics and mechanics. The editorial board sees it''s own task in rapid informing of the readers on the state-of-the-art challenges and achievements in materials science. The editorial board does its best to select high quality papers reporting new scientific results that are of interest for researchers in materials science, physics, and mechanics. "Letters on materials" invites Russian and foreign researches to publish papers in both the Russian and English languages. The scope of the journal covers the following research areas: structure analysis of materials, mechanical and physical properties of materials, production and processing of materials, experimental methods of investigation of materials, theory and computational methods in solid state physics. "Letters on materials" is designed for researchers, engineers, lecturers, and students working in the areas of materials science, mechanical engineering, metal forming, physics, and material mechanics.

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