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Исследование влияния состава электролита и режимов проведения процесса микродугового оксидирования на структуру, морфологию и свойства оксидно-керамических покрытий

Authors: Bespalova, J.I.; Panenko, I.N.;

Исследование влияния состава электролита и режимов проведения процесса микродугового оксидирования на структуру, морфологию и свойства оксидно-керамических покрытий

Abstract

The paper presents the results of the study of the formation of coatings on the surface of aluminum alloy D16 by microarc oxidation in the anodic-cathode regime with discontinuation of the discharge from the basic silicatealkaline electrolyte consisting of three solutions, in each of which the concentration of the components gradually increase. For comparison, the microarc oxidation process was also carried out in the absence of the discharge interruption from the silicate-alkaline electrolyte, which was close to the basic one. The study has shown that a change in the mode of formation of oxideceramic coatings leads to changes in their growth mechanism. The presence of sodium tetraborate in the electrolyte affects the properties of the coatings. The interrelation of morphology, composition, structure, porosity and thickness of coatings with the formation regimes and composition of electrolytes is established, which provides an opportunity to obtain oxide-ceramic coatings with predetermined properties.

Представлены результаты изучения формирования покрытий на поверхности алюминиевого сплава Д16 методом микродугового оксидирования в анодно-катодном режиме с прерыванием разряда из базового силикатно-щелочного электролита, состоящего из трех растворов, и в отсутствие прерывания разряда из силикатно-щелочного электролита, близкого по составу к базовому. Установлено, что изменение режима формирования оксидно-керамических покрытий приводит к изменению механизма их роста. Присутствие тетрабората натрия в составе электролита в рассматриваемых режимах формирования оказывает влияние на свойства оксидно-керамических покрытий. Показано, что микродуговое оксидирование в аноднокатодном режиме с прерыванием разряда обеспечивает повышенное содержание в покрытии высокотемпературной фазы оксида алюминия alpha;-Al2O3 и позволяет формировать тонкие до 25 мкм оксидно-керамические покрытия, сохраняющие все уникальные свойства.

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Keywords

оксидно-керамические покрытия, элементный состав, морфология и структура, микродуговое оксидирование, прерывание разряда., раствор электролита, термо- и плазмохимические реакции, режим формирования

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green