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Information × Registration Number 0221U102259, 0116U006497 , R & D reports Title Development and application of effective methods of determining resource products from zirconium alloys in conditions close to the conditions of operation of the reactor popup.stage_title Head Stoyev Petro I., Доктор фізико-математичних наук Registration Date 29-01-2021 Organization National Science Center "Kharkiv Institute of Physics and Technology" popup.description2 Further trouble-free operation of units and products made from zirconium alloys in reactors at nuclear power plants and a scientifically substantiated increase in their resource requires intensive research to develop methods for applying protective coatings on the surface of zirconium materials and modifying surface layers. The work is aimed at creating a modified surface layer in a zirconium alloy Zr1% Nb by the method of chemical thermal treatment (CHT) to reduce the effect of hydrogenation and corrosion processes that reduce the working life of products. As a method for the formation of the phase-structural state of the near-surface layer of the material, chemical-thermal treatment was used, which consisted of thermal diffusion saturation with oxygen and nitrogen of the surface layers. It was found that CTT does not reduce the mechanical properties that had samples of Zr1% Nb alloy in the initial state. The influence of CTT regimes on the peculiarities of oxidation in air and hydrogen saturation of samples of Zr1%Nb alloy was considered. It is shown that the CTT modes, which were used during the work, lead to an increase in the surface hardness of the samples, a decrease in the weight gain during oxidation in air at a temperature of 550 °C for 100 hours and a decrease in the hydrogen concentration during hydrogenation. It is concluded that the use of the CTT method is promising for modifying the surface layer of a material  Product Description popup.authors Yefimov Oleksandr A Andryyevsʹka Natalya F Vasylʹyev Andriy O Velykodnyy Oleksiy M Kolodiy Ihor V Kondratov Oleksandr O Mazin Oleksandr I Panov Volodymyr A Tantsyura Iryna H Tikhonovska Tetyana M Tikhonovsky Mykhailo A popup.nrat_date 2021-01-29 Close