Study of the attenuation coefficients of photon and neutron beams passing through titanium hydride

Павленко, В. И.; Едаменко, О. Д.; Черкашина, Н. И.; Kuprieva, O. V.; Носков, А. В.

doi:10.1134/s1027451015030337

Cited by 20 publications

(6 citation statements)

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“…Из-вестно, что из-за небольшой атомной массы водород -это лучший за-медлитель нейтронов, обладающий наибольшим сечением захвата ней-тронов. Одним из перспективных материалов для защиты от нейтронов является гидрид титана [19][20][21][22][23].…”

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Creating nanoshell on the surface of titanium hydride bead

Павленко¹,

Черкашина²,

Yastrebinsky³

2016

Nanotehnol. stroit.

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ExtEndEd AbstrAct:The article presents data on the modification of titanium hydride bead by creating titanium nanoshell on its surface by ion-plasma vacuum magnetron sputtering. To apply titanium nanoshell on the titanium hydride bead vacuum coating plant of multifunctional nanocomposite coatings QVADRA 500 located in the center of high technology was used.Analysis of the micrographs of the original surface of titanium hydride bead showed that the microstructure of the surface is flat, smooth, in addition the analysis of the microstructure of material surface showed the presence of small porosity, roughness, mainly cavities, as well as shallow longitudinal cracks. The presence of oxide film in titanium hydride prevents the free release of hydrogen and fills some micro-cracks on the surface. Differential thermal analysis of both samples was conducted to determine the thermal stability of the initial titanium hydride bead and bead with applied titanium nanoshell. Hydrogen thermal desorption spectra of the samples of the initial titanium hydride bead and bead with applied titanium nanoshell show different thermal stability of compared materials in the temperature range from 550 to 860 о C. Titanium nanoshells applied in this way allows increasing the heat resistance of titanium hydride bead -the temperature of starting decomposi- THE RESULTS OF THE SPECIALISTS' AND SCIENTISTS' RESEARCHES

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Section: Contact Informationunclassified

Creating nanoshell on the surface of titanium hydride bead

Павленко¹,

Черкашина²,

Yastrebinsky³

2016

Nanotehnol. stroit.

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“…Metal hydrides that have temperature stability in the high-temperature range (up to 800 • C) are the most promising [3,4]. The main attention should be paid to titanium hydride (TiH 2 ), which contains a large number of hydrogen atoms per 1 cm 3 of the metal (9.2 × 10 22 ), second only to vanadium hydride 11.4 × 10 22 [5].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, much attention has been paid to the work aimed at obtaining spherical samples of titanium hydride in which there are no cracks or their numbers are reduced to a minimum. The analysis of the available research in this direction [3,4,14] showed that the regulation of the conditions for the production (pressure and temperature conditions) of spherical titanium hydride granules does not solve the problem of the formation of surface microcracks. The most promising method is to "heal" microcracks by artificially creating a multi-barrier system of energy "traps" on the surface of the granule, which makes it possible to slow down the processes of thermal diffusion of hydrogen from the crystal lattice of titanium hydride at high temperatures and protect titanium from oxidation [5,[15][16][17][18][19][20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Increasing the Adherence of Metallic Copper to the Surface of Titanium Hydride

et al. 2021

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Studies have been carried out to increase the adhesive interaction between a titanium hydride substrate and a copper coating. An additional layer containing chemically active groups was created on the surface of the spherical titanium hydride by chemisorption modification. This paper discusses the results of scanning electron microscopy (SEM) using energy-dispersive X-ray spectroscopic mapping of coatings obtained on spherical granules of titanium hydride before and after adsorption modification. The mechanism of interaction of the surface of spherical granules of titanium hydride and titanium sulfate salt is proposed. It is shown that the creation of a chemisorbed layer of hydroxotitanyl and the subsequent electrodeposition of metallic copper contribute to the formation of a multilayer shell of a titanium–copper coating on the surface of spherical titanium hydride granules (≡Ti-O-Cu-) with a high adhesive interaction. Results have been given for an experimental study of the thermal stability of the initial spherical granules of titanium hydride and granules coated with a multilayer titanium-copper shell.

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“…It is known that the best fast neutron moderators are hydrogen-containing materials: polymers, metal hydrides, etc. (Preston and Tickner, 2017;Pavlenko et al, 2015aPavlenko et al, , 2015bAbdulrahman et al, 2020;Ibrahima and Mahdib, 2019). It is promising to use cadmium and boron-containing screens from slow (thermal) neutrons (Chrysanthopoulou et al, 2014).…”

Section: Introductionmentioning

confidence: 99%