The Effect of Copper and Manganese on the Amorphization Process in a Thin Fe–Si–Mg–O Film

Yurovskikh, А. S.; Nikul’chenkov, N. N.; Редикульцев, А. А.; Lutfieva, Z. Z.; Лобанов, М. Л.

doi:10.18502/keg.v1i1.4405

Cited by 5 publications

(5 citation statements)

References 9 publications

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“…It presumably corresponds to two amorphous phases with slightly different chemical compositions. These results are consistent with the experimental data reported in [ 22 , 23 ].…”

Section: Resultssupporting

confidence: 94%

“…The studies [ 22 , 23 ] demonstrated that a thermally stable amorphous phase is formed in the glass film surface after a full cycle of HTA in the temperature range of α → γ transformation. Based on the thermodynamic calculations, an assumption has been made about chemical interactions leading to the formation of an amorphous phase and its estimated chemical composition has been suggested.…”

Section: Introductionmentioning

confidence: 99%

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Glass Film Formation on GOES Surface during High-Temperature Annealing: The Mechanism with Amorphous Phase Formation

et al. 2022

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Ceramic insulation coating (glass film) is an important constituent of grain-oriented electrical steel (GOES) designed for use in transformers. Within the scope of this study, the glass film was obtained by means of interaction between the surface of GOES containing 0.5 wt. % Cu and a heat-resistant MgO coating during annealing up to 1100 °C in the 75%H2 + 25%N2 atmosphere. The structure of glass film was analyzed using X-ray diffraction, glow-discharge optical emission spectroscopy, scanning probe microscopy, scanning electron microscopy, differential scanning calorimetry and thermodynamic calculations. After annealing, the glass film contained the following phases: crystalline (MgFe)2SiO4 and amorphous Fe-based solid solutions. The multi-stage mechanism of the glass film formation on GOES surface during high-temperature annealing was determined.

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“…It presumably corresponds to two amorphous phases with slightly different chemical compositions. These results are consistent with the experimental data reported in [ 22 , 23 ].…”

Section: Resultssupporting

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Glass Film Formation on GOES Surface during High-Temperature Annealing: The Mechanism with Amorphous Phase Formation

et al. 2022

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“…This result is confirmed by high-resolution transmission electron microscopy (HRTEM) images of the cross-sections of as-prepared CoN and CoMnN films, as demonstrated in Figure b,c, respectively. The areas marked with red squares were chosen for fast Fourier transform (FFT) analyses, as shown in the insets, in which clear diffraction spots can be found for CoN films [points inside yellow cycles, corresponding to an interplanar distance d = 2.13 Å, consistent with a cubic CoN (200) orientation], whereas no spot is observed for CoMnN films, in agreement with XRD results and evidencing the role of Mn as a “amorphizing” agent . To further understand the compositional distribution of CoMnN films, HAADF-STEM and EELS were performed on as-deposited CoMnN films, with corresponding mappings shown in Figure d.…”

Section: Resultssupporting

confidence: 52%

“…In metallic alloys, efforts have been made to substitute Co, Ni, or Fe by Mn as an effective means to alter their magnetic and electrical behavior. − In magneto-ionics, Mn introduction may also give specific advantages. First, Mn, as an “amorphizing” agent, could favor the formation of an amorphous phase, which would promote planar-like diffusion fronts for ion motion (because, otherwise, ion motion preferentially occurs along grain boundaries). Also, Mn-substitution could introduce more defects in the crystal lattice and increase electrical resistivity, possibly leading to the modification of electrical properties, from metallic-like to semi-metallic or semiconducting behavior .…”

Section: Introductionmentioning

confidence: 99%

From Binary to Ternary Transition-Metal Nitrides: A Boost toward Nitrogen Magneto-Ionics

Tan

Martins

Escobar

et al. 2022

ACS Appl. Mater. Interfaces

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Magneto-ionics is an emerging actuation mechanism to control the magnetic properties of materials via voltage-driven ion motion. This effect largely relies on the strength and penetration of the induced electric field into the target material, the amount of generated ion transport pathways, and the ionic mobility inside the magnetic media. Optimizing all these factors in a simple way is a huge challenge, although highly desirable for technological applications. Here, we demonstrate that the introduction of suitable transition-metal elements to binary nitride compounds can drastically boost magneto-ionics. More specifically, we show that the attained magneto-ionic effects in CoN films (i.e., saturation magnetization, toggling speeds, and cyclability) can be drastically enhanced through 10% substitution of Co by Mn in the thin-film composition. Incorporation of Mn leads to transformation from nanocrystalline into amorphous-like structures, as well as from metallic to semiconducting behaviors, resulting in an increase of N-ion transport channels. Ab initio calculations reveal a lower energy barrier for CoMn−N compared to Co−N that provides a fundamental understanding of the crucial role of Mn addition in the voltage-driven magnetic effects. These results constitute an important step forward toward enhanced voltage control of magnetism via electric field-driven ion motion.

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“…Phase and structure composition for alloy Fe-3%Si-0.5%Cu [11][12][13] surface with MgO as thermostable coating, was investigated during ceramic-metallic film formation when hightemperature annealing and interesting effect of Fe-based amorphous phase formation was detected in the material surface layer…”

Section: Introductionmentioning

confidence: 99%

Mechanism of Solid-State Amorphization in the Fe-Si-Cu-Mg-O System

Nikul’chenkov

Редикульцев

Лобанов

2021

SSP

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Solid-state amorphization process occurring at 600-1060 °C continuous annealing was observed by non-ambient x-ray diffraction on Fe-3%Si-0.5%Cu alloy surface with MgO as thermostable coating. The phenomenon was occurred at α→γ transformation temperatures (920-960 °C) in a layer consisting of Si solid solution in α-Fe and oxides (MgFe)2SiO4, (MgFe)O, SiO2. Amorphous state remained both during heating and cooling to 20 °C. Simulation for diffusion amorphization of Fe (Si) solid solution was proposed. Mg2Si complexes are reduced from oxides by hydrogen then transfer to solid solution and solid-state amorphization is occurred.

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The Effect of Copper and Manganese on the Amorphization Process in a Thin Fe–Si–Mg–O Film

Abstract: .

Cited by 5 publications

References 9 publications

Glass Film Formation on GOES Surface during High-Temperature Annealing: The Mechanism with Amorphous Phase Formation

Glass Film Formation on GOES Surface during High-Temperature Annealing: The Mechanism with Amorphous Phase Formation

From Binary to Ternary Transition-Metal Nitrides: A Boost toward Nitrogen Magneto-Ionics

Mechanism of Solid-State Amorphization in the Fe-Si-Cu-Mg-O System

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