On enhancing the thermal stability of metal hydrides by ion–plasma vacuum magnetron sputtering

Павленко, В. И.; Черкашина, Н. И.; Yastrebinsky, R. N.; Demchenko, Olga

doi:10.1134/s1027451017010311

Cited by 5 publications

(4 citation statements)

References 2 publications

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Section: Introductionmentioning

confidence: 99%

“…The deposition of intermetallic alloy films (including HEAs) has been reported using various physical vapour deposition (PVD) techniques such as pulsed laser deposition, laser cladding, ion sputtering, ion plating, RF-magnetron sputtering, or flash evaporation-deposition [ 6 , 13 , 14 , 15 , 16 , 17 , 18 , 19 ]. Amongst multicomponent thin films on different alloy substrates and powders are also thin films of hydrogen storage materials (HSMs, e.g., LaNi 5 type) on different substrates [ 13 , 19 , 20 , 21 , 22 ]. The utilisation of sputtered intermetallic thin films of HSMs is considered beneficial because of their higher thermal conductivity, improved resistance to hydrogen pulverisation, and high efficiency of protective and catalytic layers as compared with their bulk counterparts [ 13 , 19 , 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

“…Amongst multicomponent thin films on different alloy substrates and powders are also thin films of hydrogen storage materials (HSMs, e.g., LaNi 5 type) on different substrates [ 13 , 19 , 20 , 21 , 22 ]. The utilisation of sputtered intermetallic thin films of HSMs is considered beneficial because of their higher thermal conductivity, improved resistance to hydrogen pulverisation, and high efficiency of protective and catalytic layers as compared with their bulk counterparts [ 13 , 19 , 23 , 24 ]. The crystallinity and capacity of the PVD thin films depend on the type of goal, kind of substrate, and sputter parameters.…”

Section: Introductionmentioning

confidence: 99%

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Modification of Hydrogenation and Corrosion Properties of Hydrogen Storage Material by Amorphous TiCrFeCoNi HEA Layer

2022

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The effect of encapsulation of LaNi4.5Co0.5 powdered hydrogen storage material with ≈0.5 µm thick, magnetron-sputtered amorphous film of TiCrFeCoNi high-entropy alloy (HEA) on functional hydrogenation parameters of the hydride electrode is discussed. The multicycle galvanostatic charge/discharge tests carried out in deaerated, 6 M KOH solution allow for determining specific capacity decrease, exchange current density of the H2O/H2 system, and high rate discharge ability (HRD) of the hydride electrodes. Concentrations of individual constituents of the HEA in the particle coating determined by EDS analysis were practically the same (≈20 at.%) as in the applied TiCrFeCoNi target material. The XRD phase analysis pointed out the amorphous structure of the HEA coating. The presence of HEA coating decreases capacity by 10–15 per cent, but increases exchange current density for H2O/H2 system. The effect of HEA on capacity fade is ambiguous: low for 10–25 cycles (most probably due to effective corrosion inhibition) and distinct at long-term cycling (most probably due to galvanic effects resulting from mechanical degradation of particle surface). The presence of HEA coating considerably improves the HRD of the electrode material: for a discharge rate of 5C, the HRD coefficient becomes 4.6 times greater for HEA modified storage material.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modification of Hydrogenation and Corrosion Properties of Hydrogen Storage Material by Amorphous TiCrFeCoNi HEA Layer

2022

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“…%) and density (up to 3.8 g/cm 3 ) make it possible to effectively use titanium hydride to simultaneously attenuate both neutron and c radiation [28][29][30][31][32]. Previous reports [33][34][35][36][37][38] have shown that modification of the surface of titanium hydride shot with borosilicate coatings or ion-plasma spraying of titanium metal significantly increases its thermal stability. e creation of a modifier shell on the surface of a shot of titanium hydride prevents thermal diffusion of hydrogen into the environment and increases the initial temperature of dehydrogenation to 500°C.…”

Section: Introductionmentioning

confidence: 99%

Radiation Resistance of a Structural Material Based on Modified Titanium Hydride

Yastrebinsky

Павленко

Karnauhov

et al. 2021

Science and Technology of Nuclear Installations

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This work investigates the radiation resistance of a structural material based on modified titanium hydride and a Portland cement in a flux of neutron and γ-radiation. An assessment of the geometric and physicomechanical properties is given, along with the surface structure of irradiated cement composites, and the phase composition of the main hydrosilicates of the hydrated cement matrix during its γ-irradiation. It is shown that the use of a shot of titanium hydride increases the radiation resistance of radiation shielding based on a cement matrix, in comparison with the unmodified shot. A composite based on a modified shot of titanium hydride retains its basic properties after γ-irradiation, at an absorbed dose of up to 10 MGy. At an absorbed dose of 2 MGy in the Portland cement matrix of a composite based on a modified shot of titanium hydride, the formation of suolunite hydrosilicates occurs. It was established using X-ray fluorescence that, in the titanium hydride, a redistribution of the electron density occurs at an absorbed dose of γ radiation of 5 MGy, caused by structural phase changes due to the ongoing dehydrogenation processes.

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Regulation of the Surface Microrelief of Titanium Hydride by Solutions of Sulfuric Acid Salts

Gorodov

Yastrebinsky

Karnauhov

et al. 2021

Lecture Notes in Civil Engineering

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On enhancing the thermal stability of metal hydrides by ion–plasma vacuum magnetron sputtering

Cited by 5 publications

References 2 publications

Modification of Hydrogenation and Corrosion Properties of Hydrogen Storage Material by Amorphous TiCrFeCoNi HEA Layer

Modification of Hydrogenation and Corrosion Properties of Hydrogen Storage Material by Amorphous TiCrFeCoNi HEA Layer

Radiation Resistance of a Structural Material Based on Modified Titanium Hydride

Regulation of the Surface Microrelief of Titanium Hydride by Solutions of Sulfuric Acid Salts

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