Synthesis of Nanostructured Nonmetallic Inorganic Coatings at High Energy Localization in Interfacial Nanolayers

Mamaev, A. I.; Dolgova, Yu. N.; Beletskaya, E. Yu.; Мамаева, В. А.; Баранова, Т. А.

doi:10.1007/s11182-021-02212-w

Cited by 5 publications

(6 citation statements)

References 3 publications

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“…In these modes, the application of the method is not widely used due to the large consumption of electricity. Recently, PEO modes based on fast-flowing (pulsed) energy effects have been used [14]. With a small value of the duration of the anode current pulse of the order of 250 microseconds, coatings characterized by low roughness are formed [15].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the properties of oxide coatings on titanium alloys obtained by plasma electrolytic oxidation

Ramazanova¹,

Zamalitdinova²,

Kovalenko³

2022

KIMS/CUMR/MShKP

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The use of structures made of titanium and its alloys, which have improved corrosion, physical and mechanical properties, are in demand in many industries. In this regard, the processes of modifying the surface of metals are of interest. One of the modern and promising methods of metal surface treatment is plasma electrolytic oxidation. Currently, there is a problem of widespread use of this process when DC modes are used in the implementation of the process. This is due to the large consumption of electricity. The purpose of this work is to study the morphological and corrosion properties of oxide coatings obtained in the pulsed anode-cathode mode on titanium alloys VT1-0 and VT5 in various electrolyte solutions. Modification of the surface of titanium alloys was carried out at the duration of the anode current pulse of 250 ± 25 microseconds, the duration of the cathode current pulse of 5 ± 0.5 ms, the repetition frequency of the anode and cathode pulses of 50 ± 0.5 Hz. Alkaline solutions served as electrolytes. Oxide coatings obtained in various electrolytes are characterized by different porosity and coating thickness. Coatings with a finely porous structure, with an average pore diameter from 0.09 microns to 0.4 microns, and larger pore sizes of 0.6 – 0.7 microns were obtained. The porosity of the coatings ranges from 6.12% to 12.2%. According to the data of energy dispersion analysis, it was found that the structure of oxide coatings includes both components of the processed metal and components of the electrolyte solution. The main components, in this case, are oxygen and processed metal, as well as other elements such as boron, phosphorus, aluminium, fluorine, sodium, silicon and others. Corrosion tests according to GOST 9.308-85 under the influence of neutral salt mist at a temperature of (35 ± 2) °C with 1500 hours in the Ascott CC 450 chamber, it was shown that there was no corrosion damage to the coatings.

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Section: Introductionmentioning

confidence: 99%

Investigation of the properties of oxide coatings on titanium alloys obtained by plasma electrolytic oxidation

Ramazanova¹,

Zamalitdinova²,

Kovalenko³

2022

KIMS/CUMR/MShKP

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“…This type of plasma refers to low-temperature plasma under pressure. This process was used to obtain non-metallic inorganic coatings, which are very much in demand in industry [6][7][8][9][10]. Other teams of scientists are also developing the conditions for microplasma production of coatings, for example, P.S.…”

Section: Introductionmentioning

confidence: 99%

“…Sturdy methods based on the electrical characteristics of microplasma processes occurring during the current passage in the electrolyte solution are not enough. Therefore, the authors [6][7][8][9][10] propose to use high-voltage (100−400 V) trapezoidal pulses of polarizing voltage as the most effective type of current from the point of view of versatile control of microplasma processes. Depending on the parameters of action, the process of producing the coatings and films can be electrochemical or plasma.…”

Section: Introductionmentioning

confidence: 99%

“…To study microplasma processes using trapezoidal pulses of polarizing voltage, it is necessary to develop more complex special voltage sources, which was done by the authors of this paper. Previous theoretical and experimental studies [6][7][8][9][10] resulted to the conclusion that the trapezoidal shape of voltage pulses is by ten times more efficient in terms of energy consumption compared to other types of current, which is very important from a technological point of view. The trapezoidal shape of the voltage was also chosen from the considerations of the most constant conditions for the coating formation from the energy impact point of view.…”

Section: Introductionmentioning

confidence: 99%

“…During the pause, no energy is consumed. Besides, the adjustable pulse width allows you to control the size of the oxide grain [10], which is formed as a result of a single microdischarge.…”

Section: Introductionmentioning

confidence: 99%

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Methods for the study and control of microplasma processes in the synthesis of coatings

Mamaev

Мамаева

2022

Technical Physics

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The physical bases for determining the ignition and quenching potentials of microplasma discharges in solutions have been developed. Chronopotentiometric, chronoamperometric dependences on the conditions for obtaining coatings and the dependence of the time constant of the transient process on the voltage and duration of the process, as well as current-voltage dependences at the rates of rise and fall of the potential voltage from 106 to 108 V/s, are obtained. The developed method is applicable to control the process of deposition of microplasma non-metallic inorganic coatings and is the basis of the technique for in situ control of coating deposition. Key words: pulsed microplasma oxidation, current-voltage dependences, controlled synthesis of oxide coatings. Keywords: pulsed microplasma oxidation, current-voltage dependences, controlled synthesis of oxide coatings.

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On the issue of modeling the process of microarc oxidation

Golubkov,

Pecherskaya,

Zinchenko

et al. 2023

AIP Conference Proceedings

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Synthesis of Nanostructured Nonmetallic Inorganic Coatings at High Energy Localization in Interfacial Nanolayers

Cited by 5 publications

References 3 publications

Investigation of the properties of oxide coatings on titanium alloys obtained by plasma electrolytic oxidation

Investigation of the properties of oxide coatings on titanium alloys obtained by plasma electrolytic oxidation

Methods for the study and control of microplasma processes in the synthesis of coatings

On the issue of modeling the process of microarc oxidation

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