Investigation of the Processes of the Formation of a Nonequilibrium Phase-Structural State in FeTiB Films Obtained by Magnetron Sputtering

Sheftel, E. N.; Tedzhetov, Valentin A.; Kiryukhantsev‐Korneev, Ph. V.; Harin, E.V.; Усманова, Г. Ш.; Жигалина, О. М.

doi:10.3103/s1067821220060206

Cited by 8 publications

(9 citation statements)

References 26 publications

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“…The diffraction patterns taken for the Fe 91.6 Ti 3.0 B 5.4 films exhibit an additional intense (200) peak of αFe observed at 2θ~64.4 • , which indicates a pronounced <001> axial texture of these films. This indicates the formation of bcc αFe-based solid solutions, compositions of which, αFe(Ti) and αFe(Zr,N), in the corresponding films were studied in detail in our previous works [1,9]. Using the diffraction patterns of the Fe 91.6 Ti 3.0 B 5.4 and Fe 88.7 Zr 4.4 N 6.9 films, containing the largest amounts of alloying elements (Ti and B or Zr and N), the peaks of additional phases (Fe 2 B boride with a tetragonal body-centered lattice and Fe 4 N nitride with a face-centered cubic lattice, respectively (Figure 3, Table 1)) were identified.…”

Section: Phase Composition Of the Deposited Filmsmentioning

confidence: 76%

“…The film thickness was measured by scanning electron microscopy (SEM). The detailed descriptions of the preparation conditions and results of the chemical analysis of the films are reported in References [1,9]. The films were annealed in a vacuum (at a residual pressure of less than 3 × 10 −4 Pa) for 1 h at temperatures of 200, 300, 400, 500, and 600 • C.…”

Section: Methodsmentioning

confidence: 99%

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Residual Stresses in Soft Magnetic FeTiB and FeZrN Films Obtained by Magnetron Deposition

et al. 2020

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The coercive field of soft magnetic ferromagnets is a structure-sensitive property and, in particular, is substantially affected by residual stresses. In the present study, the phase and structural states and residual stresses of the FeTiB and FeZrN films of various compositions, which were prepared by magnetron deposition on glass substrates and subsequent 1-h annealing at temperatures of 200–600 °C, were investigated by X-ray diffraction. The formation of a nanocrystalline structure is observed. It comprises different phases having different lattice parameters and unit-cell volumes and is characterized by high level of microstrains of grains as well; the microstrains predetermine the formation of high compressive stresses in the deposited films. As the annealing temperature increases, the compressive stresses decrease and, at certain temperatures, gradually transform into thermal tensile stresses, which are induced by the difference in the thermal expansion coefficients of the film and substrate. Thus, the heat treatment is the efficient way to improve the soft magnetic properties of the studied class of film materials produced by magnetron deposition.

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Section: Phase Composition Of the Deposited Filmsmentioning

confidence: 76%

Section: Methodsmentioning

confidence: 99%

Residual Stresses in Soft Magnetic FeTiB and FeZrN Films Obtained by Magnetron Deposition

et al. 2020

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“…Films Fe 73 Ti 5 B 19 O 3 and Fe 55 Ti 16 B 27 O 2 (hypereutectic compositions of the equilibrium Fe-TiB 2 system [27]) were prepared by magnetron sputtering of composite targets, which consist of an Fe disk (110 cm 2 in area) uniformly coated with TiB 2 ceramic segments 21 cm 2 (Fe 73 Ti 5 B 19 O 3 ) and 37 cm 2 (Fe 55 Ti 16 B 27 O 2 ) in total area (the ceramic was manufactured by self-propagation high-temperature synthesis, SHS). The preparation conditions of the targets are described in detail in [27].…”

Section: Methodsmentioning

confidence: 99%

Magnetron-Deposited FeTiB Films: From Structural Metastability to the Specific Magnetic State

Sheftel,

Tedzhetov,

Harin

et al. 2024

Coatings

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Results of XRD and TEM studies of a metastable phase state in Fe73Ti5B19O3 and Fe55Ti16B27O2 films, which is formed upon magnetron deposition under preset conditions, and of the evolution of the state in the course of subsequent annealing at 500 °C for 1, 5, and 9 h and experimental data on the magnetic microstructure and magnetic properties are reported. The annealed films were found to be characterized by a nanocrystalline structure, which is represented by two crystalline phases, namely, the ferromagnetic solid solution αFe(Ti), and nonferromagnetic boride FenB. The Ti content in the films determines the grain size of the αFe(Ti) phase, whereas the content of B localized within the grain boundaries determines the ratio of the volume fractions of amorphous and nanocrystalline phases in the structure. In contrast to the ferromagnetic Fe73Ti5B19O3 films, the Fe55Ti16B27O2 films are superparamagnets both in the deposited state and after annealing at 500 °C for 1 and 5 h because of the higher volume fraction of the amorphous phase in the structure. The 9 h annealing of the Fe55Ti16B27O2 films transfers them into the ferromagnets owing to the development of the amorphous phase crystallization, increase in the content of nanocrystalline ferromagnetic phase αFe(Ti) grains, and realization of exchange interaction between them.

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“…In addition, the porous structures can be seen clearly in the surface images. In solid solutions, chromium and vanadium atoms intrude between nickel atoms, reducing the column diameters of catalyst surfaces [43,44]. Thus, catalysts with porosity are obtained [45].…”

Section: Characterizationmentioning

confidence: 99%

Investigation of Hydrogen Production Performance Using Nanoporous NiCr and NiV Alloys in KBH4 Hydrolysis

Akkuş

2022

Energies

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Studies of storage and production of hydrogen, which is an alternative to fossil fuels, have been intensified. Hydrogen production from metal borohydrides via catalyst is very attractive because of its advantages, such as controlled production, high hydrogen content, nontoxicity, etc. In this study, the catalytic performances of nanoporous nickel–chromium alloy and nickel–vanadium alloy catalysts prepared with magnetron sputtering in hydrolysis of potassium borohydride, which is a hydrogen storage material, were investigated. Parameters that affected the hydrolysis reaction rate, such as the temperature, the amount of catalyst, and the volume of 0.5 M HCl solution were investigated using response surface methodology. In addition, the prepared catalysts were characterized with XRD and FE-SEM analysis, and the remaining solutions after the reactions were characterized with FE-SEM/EDS analysis. Using response surface methodology, optimum conditions for the maximum hydrogen production rate were determined to be 1.65 g of catalyst, 6% KBH4, 3% NaOH, and 7 mL of 0.5 M HCl at 333 K. Under these conditions, the hydrogen production rates were calculated as 68.9 L·min−1·gcat−1 and 76.5 L·min−1·gcat−1 for NiCr and NiV, respectively.

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Investigation of the Processes of the Formation of a Nonequilibrium Phase-Structural State in FeTiB Films Obtained by Magnetron Sputtering

Cited by 8 publications

References 26 publications

Residual Stresses in Soft Magnetic FeTiB and FeZrN Films Obtained by Magnetron Deposition

Residual Stresses in Soft Magnetic FeTiB and FeZrN Films Obtained by Magnetron Deposition

Magnetron-Deposited FeTiB Films: From Structural Metastability to the Specific Magnetic State

Investigation of Hydrogen Production Performance Using Nanoporous NiCr and NiV Alloys in KBH4 Hydrolysis

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