Abstract
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.
Highlights
In connection with the development of the nuclear industry around the world, the development of new materials for radiation protection has become a necessity
Spherical granules of titanium hydride have microcracks of 20–30 nm on the surface (Figure 1a). These defects of the surface layer are formed as a result of the occurrence of internal stresses associated with the difference in the rate of hydrogen adsorption on the surface of the granules and the rate of its diffusion into titanium metal particles
To increase the layer thermal of that titanium hydride, a promising direction into is to the crea modified sorption on stability its surface prevents the diffusion of hydrogen ate a modified sorption layer on its surface that prevents the diffusion of hydrogen into environment
Summary
In connection with the development of the nuclear industry around the world, the development of new materials for radiation protection has become a necessity. The main focus in this area is on the development of composites based on transition metal hydrides [1,2]. Titanium hydride in the form of polydisperse crumbs is used to fill voids and gaps between radiation-protective products. The disadvantage of titanium hydride crumbs is the presence of up to 5% of the fine fraction (less than 0.2 mm) in its composition. This factor is an obstacle to the widespread use of crumbs since the fine fraction is fire hazardous and explosive, and additional hydrogen is released during operation at high temperatures [6,7]
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