Search academic texts

Information × Registration Number 0220U100479, 0118U100164 , R & D reports Title Physical Metallurgy of the Hydrogen-Resistant Structural Materials and Hydrogen Storage Materials popup.stage_title Head Teus Sergiy M., Кандидат фізико-математичних наук Registration Date 20-01-2020 Organization G. V. Kurdyumov IMPh of the N.A.S.U. popup.description2 Using first-principles atomic simulations of hydrogen effect on the density of electron states of iron it is shown that hydrogenation results in the increased concentration of free electrons. The consequence of such effect is the increase in the metallic component of interatomic bonding. The simulation of special distribution of electron density in iron has been carried out. It is shown that the concentration of free electrons is increased in the vicinity of hydrogen atom and form the atmosphere around it during hydrogen migration. By means of molecular dynamics simulations it is shown that hydrogen grain boundary segregation in iron decreases the recrystallization temperature that is in agreement with the experimental measurements. The volumetric effects and porosity during the heating of powder mixtures of the alloy Zr-Ti-Nb have been studied. Such characteristics depends on the types of initial powder and less by the general chemical composition of mixtures. It is shown that the usage of hydrogenated master alloys, owing to the similar behavior of all starting powder particles in the system during heating and hydrogen desorption allows to reduce the final porosity and improve the mechanical properties of studied allows. Using heterophase eutectic alloy Ti-Zr-Mn and single-phase Ti-Zr-Mn-V-Сr alloy it is shown that for any initial structure, chemical and phase composition, the substitution of titanium iodine with titanium sponge does not affects the structure, phases and hydrogen sorption properties of the alloys but results in the decreased cost price of hydride. The role of МАХ-phase Ti3AlC2 addition on sorption properties of magnesium hydride has been studied. It is shown that there is an effect on the kinetic and thermodynamic parameters as well as on the hydrogen sorption and desorption properties of magnesium. Product Description popup.authors Dehtyarenko Volodymyr A. Kiryan Inna M. Oryshych Denys V. Stasiuk Oleksandr O. popup.nrat_date 2020-04-02 Close