Thermal stability, structure and phase composition of Ni x (NbO)100–x composites

Семененко, К И; Kashirin, M. A.; Stognei, O. V.; Al-Maliki, Ahmed

doi:10.1134/s1027451016040157

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…Then dα/dT is calculated from dα/dT = ( 1/ΔH )·( 1/Φ )·( dH/dt ). The f(α) and g(α) are kinetic functions, which are taken from references [ 7 , 13 , 14 ]. The activation energy E of crystallization can be calculated to be 3.84×10 5 KJ/mol by substituting the measured data into the equation for data processing.…”

Section: Craystalline Kinetics and Microstructure Of Depositsmentioning

confidence: 99%

“…The research on amorphous and nanocrystal Ni-Mo alloys indicates that the reactivity and stability of Ni-Mo alloys for electrocatalytic hydrogen evolution are closely related to the existence state of phase composition and microstructure. As hydrogen evolution cathodes, it shows an excellent electrochemical property due to the inner amorphous structure of the material [11][12][13][14][15]. The microstructure in the alloy determines the macroscopic properties of the electrode.…”

Section: Introductionmentioning

confidence: 99%

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Phase, microstructure and service character of as-deposited and short-time heat-treated Ni-Mo alloys with mixed state

Zhuo

et al. 2021

PLoS ONE

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Considering the amorphous and nano-crystalline cluster structure and their activity, on the basis of the mixed structure Ni-Mo alloys, the crystallization kinetics of the alloys and the performance of the alloys after heat treatment with different mixed structure were studied. The phase structure and composition were determined by X-ray powder diffraction. The crystallization activation energy of the mixed structure was obtained by differential scanning calorimetry. The electrochemical activity of the mixed structure alloy was determined by electrochemical analysis. The experimental results show that the structural stability of the mixed-structure alloy is better, but the crystallization activation energy is much lower than that of the amorphous alloy. The crystallization process consists of a meta-stable structure transition and a new phase formation. The electrochemical properties of the alloy indicated that the alloy with the mixed structure has higher electrochemical activity, with higher hardness and better corrosion resistance, which results from the large true contact surface and the large number of active centers in this material structure.

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Section: Craystalline Kinetics and Microstructure Of Depositsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Phase, microstructure and service character of as-deposited and short-time heat-treated Ni-Mo alloys with mixed state

Zhuo

et al. 2021

PLoS ONE

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Thermal Stability of (Mg/NbO_x)₈₂ Multilayer Nanostructure

Stognei,

Smirnov,

Sitnikov

et al. 2024

Physica Status Solidi (a)

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Thermal stability of the multilayer (Mg/NbOx)82 nanostructure and the effect of heat treatment on its electrical properties and phase composition depending on the bilayer thickness are studied. The studied (Mg/NbOx)82 samples contain 82 bilayers whose thickness varies in the range from 2.2 to 6.2 nm. The NbOx layer thickness in the multilayers is the same (0.96 nm) in all samples, while the magnesium layers thickness is varied. It is established that the magnesium layers are either discrete (a set of nanosized particles) or continuous depending on their thickness. A metallothermic reaction occurs in (Mg/NbOx)82 multilayer nanostructures at a temperature of 430 °C: niobium oxide decomposes and the released oxygen partly oxidizes the magnesium layers. That leads to the conductive magnesium metal layers breaking and to the sharp increase of the nanostructures’ resistance by more than two orders. Despite the metallothermic reaction, the layering of the (Mg/NbOx)82 nanostructures as a whole and the presence of unoxidized magnesium inclusions remain even after heating up to 450 °C.

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Multilayer Mg/NbO thin film nanostructures

Stognei

Смирнов

Sitnikov

et al. 2021

Solid State Communications

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Thermal stability, structure and phase composition of Ni x (NbO)100–x composites

Cited by 3 publications

References 7 publications

Phase, microstructure and service character of as-deposited and short-time heat-treated Ni-Mo alloys with mixed state

Phase, microstructure and service character of as-deposited and short-time heat-treated Ni-Mo alloys with mixed state

Thermal Stability of (Mg/NbO_x)₈₂ Multilayer Nanostructure

Multilayer Mg/NbO thin film nanostructures

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Thermal stability, structure and phase composition of Ni x (NbO)100–x composites

Cited by 3 publications

References 7 publications

Phase, microstructure and service character of as-deposited and short-time heat-treated Ni-Mo alloys with mixed state

Phase, microstructure and service character of as-deposited and short-time heat-treated Ni-Mo alloys with mixed state

Thermal Stability of (Mg/NbOx)82 Multilayer Nanostructure

Multilayer Mg/NbO thin film nanostructures

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Product

Resources

About

Thermal Stability of (Mg/NbO_x)₈₂ Multilayer Nanostructure