Effect of radiation by low-energy alpha-particles on the surface structure and physical-mechanical properties of high-purity tungsten was studied. Samples of tungsten were irradiated by 4He+2 ions with the energy of 45 keV at low-energy channel of accelerator DC-60 in Astana branch of Institute Nuclear Physics. Irradiation fluence was 1.5 × 1018 cm−2, irradiation temperature was 150°C. Experimentally found that irradiation with low-energy alpha particles results in formation of helium filled bubbles in the straggling region.

At present, structural materials capable of absorbing thermal neutrons are used for long-term, compacted storage of spent nuclear fuel. This is necessary to prevent the occurrence of a fission reaction in clusters of nuclear materials. A promising direction in this area is the use of neutron-absorbing coatings. In this paper, it is proposed to use coatings of the B-Ti system for this purpose. The model calculations carried out using the MCU-REA program show the sufficient effectiveness of such coatings. The average path length of the neutron in the coating is ~ 90 μm. The dependence of the degree of attenuation of the neutron flux on the thickness of the coating is shown. Calculations show that the main role is played not by the thickness of the coating, but by the boron concentration in the material. For the synthesis of coatings, the method of magnetron sputtering is considered. Аn experimental magnetron boron-containing target for a four-channel magnetron installation VUP-5M was fabricated.

The consistent patterns of changes in nanostructure and nanohardness of Ni-Ti alloy after irradiation with 84 Kr 15+ ions with 147 MeV energy to the fluence of 1•10 19 m-2 at 250 and 300 0 С temperatures depending on phase composition have been experimentally studied. It was shown that significant (44-94%) softening of surface layers for the single-phase and two-phase Ni-Ti alloys is connected with the formation of bubble nanostructured defects and complete sputtering of the process layers. The role of nanostructure in roughness of the irradiated Ni-Ti alloy surface of various phase composition has been established.

The consistent patterns of changes in nano- and micro-hardness of Ni-Ti alloy with the shape memory effect after implantation of ₄₀Ar⁸⁺ and ₈₄Kr¹⁵⁺ ions depending on phase composition and implantation parameters have been experimentally studied. It has been shown that softening by 4 and 14% near the surface of the two-phase Ni-Ti alloy after implantation of ₄₀Ar⁸⁺ and ₈₄Kr¹⁵⁺ ions is connected with the differences in the nanostructure. Hardening of the near-surface layer of this alloy maximum by 118% at h = ~3 pm and single-phase alloy in the entire region of the ₄₀Ar⁸⁺ and ₈₄Kr¹⁵⁺ ions range and in the out-range (h > R_p) area have been detected. The role of the current intensity of the ions beam in the change of nanohardness for the two-phase Ni-Ti alloy has been established.

The paper reports results of comparative studies of the structure and physical-mechanical properties of stainless Cr18Ni10Ti steel and (TiMo)N coatings irradiated by He, Kr, and Xe ions with an energy of 20 keV/charge. Samples of steel and specimens with TiMoN coating on steel substrates synthesized by vacuum condensation with ion bombardment were irradiated with He, Ks and Xe ions on the low-energy channel of a DC-60 heavy-ion accelerator. It was found that the TiMoN coating significantly exceeds Cr18Ni10Ti stainless steel in the entire range of studied properties, such as strength, corrosion resistance and tendency to blistering.