Anomalies in Ni-Fe nanogranular films growth

Zubar, T.I.; Шарко, С. А.; Тишкевич, Д.И.; Kovaleva, N. N.; Винник, Д.А.; Gudkova, S.A.; Trukhanova, E.L.; Trofimov, Evgeny; Чижик, С. А.; Panina, L.V.; Труханов, С.В.; Труханов, А.В.

doi:10.1016/j.jallcom.2018.03.245

Cited by 101 publications

(33 citation statements)

References 30 publications

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“…There are several theories about the influence of PC conditions on the chemical composition of the electrodeposited Ni-Fe matrix. In many cases, specific PC conditions can increase the concentration of Fe in alloys, which was confirmed by Zubar et al [21]. In that work, a higher concentration of Fe in Ni-Fe alloys was obtained in the frequencies lower than 500 Hz and duty cycle equal to 50%.…”

Section: Chemical Compositionsupporting

confidence: 65%

“…In that work, a higher concentration of Fe in Ni-Fe alloys was obtained in the frequencies lower than 500 Hz and duty cycle equal to 50%. Moreover, in Ni-Febased nanocomposites with a higher density of grain boundaries, the Fe concentration should be higher [21]. On the other hand, close to the working electrode, the concentration of Fe 2+ becomes depleted as a result of an anomalous reduction of Fe ions [22].…”

Section: Chemical Compositionmentioning

confidence: 99%

“…On the contrary, other studies indicated that Al 2 O 3 [29] or Si 3 N 4 [30] particles influence the increased roughness of the electrodeposited Ni-Fe composites. The literature also reports that PC conditions allow smoother surfaces of electrodeposited composites to be obtained when compared with those achieved in DC conditions [21]. Zubar et al [21] noticed that using high frequency PC electrodeposition results in Ni-Fe alloys with low porosity, defect-free microstructures and lower roughness than under DC conditions.…”

Section: Surface Morphology and Roughnessmentioning

confidence: 99%

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Microstructure and Properties of Electrodeposited nc-TiO2/Ni–Fe and Ni–Fe Coatings

et al. 2019

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In this study, nc-TiO 2 /Ni-Fe composite coatings, and Ni-Fe alloys as equivalents to their matrices, were obtained from citratesulphate baths in the electrodeposition process using direct current and pulse current conditions. The aim of the study was to examine the effects of TiO 2 nanoparticles and current conditions on the chemical composition, surface morphology, microstructure, microhardness and magnetic properties of the electrodeposited coatings. The results show that the concentration of Fe in Ni-Fe alloys is related to the current conditions and is higher in the case of pulse current electrodeposition, while such a relationship was not observed for composites. The reinforcement of composites with TiO 2 nanoparticles results in a more developed surface topography with many nodule-like structures. Composites and equivalent alloys deposited in pulse current are characterized by a finer grain size than those obtained in direct current. TiO 2 nanoparticles and their agglomerates, several tens of nanometres in size, are distributed randomly in the Ni-Fe matrix of composites deposited in both current conditions used. Incorporation of a high volume fraction of nc-TiO 2 , exceeding over a dozen percent, and decreasing the nanograin size in nc-TiO 2 /Ni-Fe composites electrodeposited under pulse current conditions, allow a higher hardness to be achieved than in their counterparts obtained using direct current. Magnetic measurements showed ferromagnetic ordering of pristine TiO 2 nanoparticles, however, the introduction of TiO 2 nanoparticles into the Ni-Fe matrix resulted in a decrease in coercivity and saturation magnetization.Publisher's Note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

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Section: Chemical Compositionsupporting

confidence: 65%

Section: Chemical Compositionmentioning

confidence: 99%

Section: Surface Morphology and Roughnessmentioning

confidence: 99%

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Microstructure and Properties of Electrodeposited nc-TiO2/Ni–Fe and Ni–Fe Coatings

et al. 2019

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“…More information on the details of the experiments can be read in [38]. Additionally, the spin glass state occurs when the crystallite size is less than a critical value of 10 nm, with its morphology comprising a combination of small grains (<10 nm) and nanograins (~100 nm), as seen in electrodeposited Ni–Fe permalloy films [40,41]. Magnetic configurations in quaternary alloys are in accordance with the occupancy of the fourth element [42].…”

Section: Fundamental Conceptsmentioning

confidence: 99%

Ferromagnetic Shape Memory Heusler Materials: Synthesis, Microstructure Characterization and Magnetostructural Properties

et al. 2018

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An overview of the processing, characterization and magnetostructural properties of ferromagnetic NiMnX (X = group IIIA–VA elements) Heusler alloys is presented. This type of alloy is multiferroic—exhibits more than one ferroic property—and is hence multifunctional. Examples of how different synthesis procedures influence the magnetostructural characteristics of these alloys are shown. Significant microstructural factors, such as the crystal structure, atomic ordering, volume of unit cell, grain size and others, which have a bearing on the properties, have been reviewed. An overriding factor is the composition which, through its tuning, affects the martensitic and magnetic transitions, the transformation temperatures, microstructures and, consequently, the magnetostructural effects.

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“…The prevailing steel coatings include traditional coatings, superhydrophobic coatings, conducting polymer coatings and nanopolymer composite coatings. Traditional metal coatings have excellent mechanical properties, high resistance to corrosion and functional properties such as magnetostatic shielding and resistance to radiation [1][2][3][4]. However, their use is restricted due to shortcomings such as toxicity, high cost and short service life.…”

Section: Introductionmentioning

confidence: 99%

A Review on Conducting Polymers and Nanopolymer Composite Coatings for Steel Corrosion Protection

Zhang

2019

Coatings

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Corrosion is the principal reason for causing degradation of steel material properties, and coating is one of the most popular and effective ways to protect steel from corrosion. There are many kinds of coatings with different constituents, mechanisms and effectiveness. This paper presents a comprehensive review on the development of coating technology including traditional coatings, hydrophobic coatings, conducting polymer coatings and nanopolymer composite coatings. In particular, conducting polymers and nanopolymer composite coatings are reviewed in detail, which are the most popular and promising coatings. The advantages and limitations of each coating method as well as the influencing factors on corrosion protection are elaborated. Finally, the future research and applications are proposed.Coatings 2019, 9, 807 2 of 22 fluorocarbon coating, silicone coating, polyurethane coating and zinc-rich coating, provide corrosion protection by their barrier effect to ionic species, oxygen and water transport, which diminishes the corrosion rate [5][6][7], but their shortcomings are still significant, such as low impact strength, poor weatherability, poor bond strength and poor durability [8]. Almost all prevailing superhydrophobic coatings can adopt nanotechnology. Silica nanoparticles [9][10][11], carbon nanotubes [12,13], titanium oxide nanotubes [14][15][16][17], nanopolymers [18][19][20] and nanosilane [21][22][23] have been widely used for fabricating superhydrophobic coatings. Procedures such as the dip coating technique, electroless plating, sol-gel process and electro deposition are adopted to fabricate the superhydrophobic coatings. The water contact angles of the superhydrophobic coatings can reach 145-165 • C [9-23]. There is also some literature about using soft lithography method based on a polydimethylsiloxane (PDMS) template to prepare nanostructured superhydrophobic coatings [24,25]. Although significant progress has been achieved regarding the synthesis of superhydrophobic coatings and their anticorrosion properties for steel, the majority superhydrophobic coatings have been studied only in laboratory till now, and there are still many obstacles before they could be widely used in industry. The prevailing fabrications are complicated, costly and not suitable for on-site use. Many efforts should be made to develop an optimum superhydrophobic coating with excellent water repellency, long service life, good adhesion performance, low cost, easy fabrication and convenience in site spraying and curing.In recent years, conducting polymer coatings and nanopolymer composite coatings have been widely used in many projects. Many studies on nanopolymer composite coatings, conducting polymers and their combinations were conducted with a good deal of progress. Some new nontoxic corrosion protection materials with the properties of high efficiency and smart corrosion protection, long effective period and easy construction have been developed.Different coatings have deferent deposition mechanisms. At present, the prev...

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Anomalies in Ni-Fe nanogranular films growth

Cited by 101 publications

References 30 publications

Microstructure and Properties of Electrodeposited nc-TiO2/Ni–Fe and Ni–Fe Coatings

Microstructure and Properties of Electrodeposited nc-TiO2/Ni–Fe and Ni–Fe Coatings

Ferromagnetic Shape Memory Heusler Materials: Synthesis, Microstructure Characterization and Magnetostructural Properties

A Review on Conducting Polymers and Nanopolymer Composite Coatings for Steel Corrosion Protection

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