On the Structure and Properties of Composite Electrochemical Coatings. A Review

Целуйкин, В. Н.

doi:10.1134/s2070205116010251

Cited by 27 publications

(7 citation statements)

References 61 publications

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“…Preparation of such coatings is rather complicated with regard to obtained properties since there are plenty of variables associated with the PEO process, such as applied current or voltage, time of preparation, the optimal chemical composition of electrolyte and in the case of unipolar pulsed or AC signal also frequency, the shape of the signal, duty cycle, etc. [26][27][28][29][30][31]. Probably the most negative feature of PEO coatings, despite many efforts, is still their porosity and consequently their limited corrosion stability.…”

Section: Introductionmentioning

confidence: 99%

PEO of AZ31 Mg Alloy: Effect of Electrolyte Phosphate Content and Current Density

Hadzima

Kajánek

Jambor

et al. 2020

Metals

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In this work, the quality of coatings prepared by plasma electrolytic oxidation (PEO) on an AZ31 magnesium alloy were evaluated. This was done by studying the effects of the chemical composition of phosphate-based process electrolytes in combination with different applied current densities on coating thickness, porosity, micro-cracking and corrosion resistance in 0.1 M NaCl. Both processing parameters were studied in four different levels. Mid-term corrosion resistance in 0.1 M NaCl was examined by electrochemical impedance spectroscopy and based on this, corrosion mechanisms were hypothesized. Results of performed experiments showed that the chosen processing parameters and electrolyte composition significantly influenced the morphology and corrosion performance of the prepared PEO coatings. The PEO coating prepared in an electrolyte with 12 g/L Na3PO4·12H2O and using an applied current density 0.05 A/cm2 reached the highest value of polarization resistance. This was more than 11 times higher when compared to the uncoated counterpart.

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Section: Introductionmentioning

confidence: 99%

PEO of AZ31 Mg Alloy: Effect of Electrolyte Phosphate Content and Current Density

Hadzima

Kajánek

Jambor

et al. 2020

Metals

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“…The huge diversity of thin film materials available, and still to discover, implies the existence of several wet/dry, chemical/physical, and vacuum/atmospheric processing and fabrication techniques [128,129]. Regarding the scope of this work, the wet chemical deposition techniques are not discussed here; their overview can be found elsewhere, including the sol-gel [130,131], chemical bath [131,132], spray pyrolysis [133,134], electrophoretic deposition [135], and electroplating [136][137][138] techniques. Considering only dry vacuum deposition methods, it is possible to classify these techniques into two groups, physical and chemical processes [139].…”

Section: Thin Film Deposition Methodsmentioning

confidence: 99%

Gas Sensors Based on Localized Surface Plasmon Resonances: Synthesis of Oxide Films with Embedded Metal Nanoparticles, Theory and Simulation, and Sensitivity Enhancement Strategies

et al. 2021

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This work presents a comprehensive review on gas sensors based on localized surface plasmon resonance (LSPR) phenomenon, including the theory of LSPR, the synthesis of nanoparticle-embedded oxide thin films, and strategies to enhance the sensitivity of these optical sensors, supported by simulations of the electromagnetic properties. The LSPR phenomenon is known to be responsible for the unique colour effects observed in the ancient Roman Lycurgus Cup and at the windows of the medieval cathedrals. In both cases, the optical effects result from the interaction of the visible light (scattering and absorption) with the conduction band electrons of noble metal nanoparticles (gold, silver, and gold–silver alloys). These nanoparticles are dispersed in a dielectric matrix with a relatively high refractive index in order to push the resonance to the visible spectral range. At the same time, they have to be located at the surface to make LSPR sensitive to changes in the local dielectric environment, the property that is very attractive for sensing applications. Hence, an overview of gas sensors is presented, including electronic-nose systems, followed by a description of the surface plasmons that arise in noble metal thin films and nanoparticles. Afterwards, metal oxides are explored as robust and sensitive materials to host nanoparticles, followed by preparation methods of nanocomposite plasmonic thin films with sustainable techniques. Finally, several optical properties simulation methods are described, and the optical LSPR sensitivity of gold nanoparticles with different shapes, sensing volumes, and surroundings is calculated using the discrete dipole approximation method.

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“…Coatings with adequate hardness and wear resistance are usually deposited on devices that are employed for harsh forming, cutting, and casting usages, wherever the process situations generally lead to elevated temperatures, enhanced mechanical loads, and increased wear [58][59][60]. Coatings consisting of hard Cr are noted due to their excellent corrosion and wear resistance; however, materials such as carbon-based materials, boride, oxides, carbides, and nitrides are also widely utilized in fabricating hard coatings because of their superior tribological and mechanical characteristics [61][62][63][64].…”

Section: Electrodeposition Of Nickel Matrix Composite Coatings Via Boride Particlesmentioning

confidence: 99%

Electrodeposition of Nickel matrix composite coatings via various Boride particles: A review

Torkamani

Velashjerdi

Abbas

et al. 2021

jcc

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Composite electrodeposition or Electroplating is a process primarily applied in the industry through which metal substrates are coated with an additional phase, such as low-thickness films of a range of metals. Lately, the advent of coating based on metal matrix through deposition has been vital because the superior hardness has more improved wear and corrosion resistance than alloy-based or pure coatings of metal. Nickel is an engineering material, which has been broadly utilized for metal matrix applications. This paper summarizes recent research on the electrodeposition of nickel matrix composite coatings with borides ceramic particles. Some of these particles are ZrB 2 , BN, TiB 2 , Ni 3 B, CrB 2 , etc. in the nickel matrix. In addition, the most important results achieved in the field of these composite coatings were collected in this review.

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On the Structure and Properties of Composite Electrochemical Coatings. A Review

Cited by 27 publications

References 61 publications

PEO of AZ31 Mg Alloy: Effect of Electrolyte Phosphate Content and Current Density

PEO of AZ31 Mg Alloy: Effect of Electrolyte Phosphate Content and Current Density

Gas Sensors Based on Localized Surface Plasmon Resonances: Synthesis of Oxide Films with Embedded Metal Nanoparticles, Theory and Simulation, and Sensitivity Enhancement Strategies

Electrodeposition of Nickel matrix composite coatings via various Boride particles: A review

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