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Multilayer tungsten/quasi-crystal Ti-Zr-Ni systems as promising materials for protective elements in a fusion reactor
(Ukrainian Nuclear Society National Science Center "Kharkiv Institute of Physics and Technology" NAS of Ukraine, 2024) Malykhin, S. V.; Kopylets, I. A.; Surovitskiy, S. V.; Konotopsky, D. V.; Lytvinyuk, L. E.
Review of methods for synthesis, preparation of powders and pellets of materials based on rare earth elements with titanium, hafnium and zirconium as promising neutron absorbers for nuclear reactors
(Ukrainian Nuclear Society National Science Center "Kharkiv Institute of Physics and Technology" NAS of Ukraine, 2024) Chernov, I. O.; Malykhin, S. V.
The methodology for X-ray diffraction investigation of icosahedral quasicrystals substructure
(STC "Institute for Single Crystals", 2013) Bazdyreva, S. V.; Fedchuk, N. V.; Malykhin, S. V.; Pugachov, A. T.; Reshetnyak, M. V.; Zubarev, Evgeniy N.
Erosion features of tungsten surfaces under combined steady-state and transient plasma loads
(Національний науковий центр "Харківський фізико-технічний інститут", 2016) Herashchenko, S. S.; Makhlaj, V. A.; Girka, O. I.; Aksenov, N. N.; Bizyukov, I. A.; Malykhin, S. V.; Surovitskiy, S. V.; Sereda, K. N.; Bizyukov, A. A.
The paper presents the experimental research on damage of the tungsten surfaces under combined plasma exposures. Steady-state hydrogen exposures (particle flux of 2×10²² mˉ² sˉ¹, heat flux of 1.7 MW/m², fluence of 10²⁶ mˉ², average ion energy of 2 keV) were provided by FALCON ion source. The pulsed plasma loads below the tungsten melting threshold (hydrogen plasma streams with surface heat load of 0.45 MJ/m² and the pulse duration of 0.25 ms) were performed by means of QSPA Kh-50 device. The behavior of structure, sub- structure and stress-state of tungsten samples have been studied after each cycle of pulsed and steady-state plasma loads.
Damaging of tungsten and tungsten–tantalum alloy exposed in ITER ELM-like conditions
(Elsevier Inc., 2016) Makhlai, V. A.; Garkusha, I. E.; Linke, J.; Malykhin, S. V.; Aksenov, N. N.; Byrka, O. V.; Herashchenko, S. S.; Surovitskiy, S. V.; Wirtz, M.
The damage of deformed double forged pure tungsten (W) and tungsten alloyed with 5 wt% tantalum (WTa5) have been studied in experimental simulations of ITER-like transient events with relevant surface heat load parameters (energy density up to 0.75 MJ/m 2 and the pulse duration of 0.25 ms) as well as particle loads (varied in wide range from 10 23 to 10 27 ion/m 2 s) with quasi-stationary plasma accelera- tor QSPA Kh-50. The plasma exposures were performed for the targets maintained at room temperature and preheated at 200 °C. The surface heat loads were either with no melting of W surface or above the melting threshold. The development of surface morphology of the exposed targets as well as cracking and swelling at the surface is discussed. Surface analysis was carried out with an optical microscopy and SEM. Surface modification and development of cracks led to increases of roughness of exposed surfaces. X-ray diffraction (XRD) has been used to study the micro-structural evolution of the exposed targets. The micro deformations of W and WTa5 are similar for targets exposed under similar conditions. The contri- bution of excess complexes of interstitial atoms in the formation of cracks after plasma irradiation was evaluated.
X-ray studying amorphous → quasicrystal transformations in sputtered Ti-Zr-Ni films
(Харківський національний університет ім. B. H. Каразіна, 2019) Shipkova, I. G.; Malykhin, S. V.; Zubarev, Evgeniy N.; Surovitskiy, S. V.; Kopylets, I. A.
Structural-phase changes in thin films and surface layers of Ti₄₁.₅Zr₄₁.₅Ni₁₇ alloy, stimulated by radiation-thermal impact of hydrogen plasma
(Національний науковий центр "Харківський фізико-технічний інститут", 2018) Surovitskiy, S. V.; Herashchenko, S. S.; Makhlaj, V. A.; Malykhin, S. V.; Kopylets, I. A.
Erosion properties of tungsten and WTa5 alloy exposed to repetitive QSPA plasma loads below melting threshold
(Національний науковий центр "Харківський фізико-технічний інститут", 2018) Makhlai, V. A.; Aksenov, N. N.; Byrka, O. V.; Garkusha, I. E.; Herashchenko, S. S.; Malykhin, S. V.; Surovitskiy, S. V.; Wirtz, M.; Sadowski, M. J.
Materials in conditions of high power plasma loads: surface damage and modification
(Taras Shevchenko National University of Kyiv, 2018) Makhlai, V. A.; Aksenov, N. N.; Byrka, O. V.; Garkusha, I. E.; Chunadra, A. G.; Herashchenko, S. S.; Malykhin, S. V.; Sereda, K.; Surovitskiy, S. V.
The paper discusses main features of material response to the repetitive powerful plasma impacts caused either the damage mechanisms and erosion behaviour or modification of surface layer and alloying with plasma species, aimed at improvement of material performance. Influence of powerful plasma impacts on several materials used for the construction of energy systems, i.e. steels as well as tungsten coatings, and pure tungsten has been discussed.
Features of surface modification of copper-based alloys under powerful plasma exposures
(Національний науковий центр "Харківський фізико-технічний інститут", 2018) Byrka, O. V.; Aksenov, N. N.; Chunadra, A.; Herashchenko, S. S.; Makhlai, V. A.; Malykhin, S. V.; Sereda, K.; Surovitskiy, S. V.; Garkusha, I. E.

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