102 research outputs found
Structure and properties of vacuum arc single-layer and multiperiod two-layer nitride coatings based on Ti(Al): Si layers
The paper provides an analysis of impact of deposition conditions on structural and phase state and thermal stability of vacuum arc coatings based on Ti(Al):Si layer
Structural features and physico-mechanical properties of AlN-TiB2-TiSi2 amorphous-like coatings
Deformation mechanism and microstructures on polycrystalline aluminum induced by high-current pulsed electron beam
Structure and mechanical properties of TiAlSiY vacuum-arc coatings deposited in nitrogen atmosphere
The effect of a negative bias potential applied to the substrate on elemental composition, structure, and mechanical properties of vacuum-arc TiAlSiY nitride coatings is investigated by different method
Peculiarities of the formation of multicomponent AlN-TiB2-TiSi2 composite ceramics coatings during heat treatment
ВЛИЯНИЕ ВЫСОКОФЛЮЕНСНОГО ИОННОГО ОБЛУЧЕНИЯ НА СТРУКТУРУ И МЕХАНИЧЕСКИЕ СВОЙСТВА ПОКРЫТИЙ ИЗ НАНОСТРУКТУРИРОВАННЫХ НИТРИДОВ ВЫСОКОЭНТРОПИЙНЫХ СПЛАВОВ (Ti, Hf, Zr, V, Nb)
The effect of high-fluence ion irradiation of nanostructured coatings based on high-entropy compound (Ti, Hf, Zr, V, Nb) N was studied. The irradiation was performed using helium ions with an energy of 500 keV in the fluence range of 5 · 1016–3 · 1017 ion/cm2. The thermal annealing at 773 K during 15 min was done with the aim of modeling conditions of this material exploitation in a nuclear reactor. The elemental composition, structure, morphology, as well as mechanical properties of (Ti, Hf, Zr, V, Nb) N coatings were investigated before and after the irradiation. According to the results of this study, there are no significant structural or phase changes in coatings after irradiation, except a strong fragmentation of grains to a size less than 10 nm. Also, there are not observed any changes in the elemental composition. The non-linear behavior of coating hardness on irradiation fluence was detected. It can be argued according to the experimental results that nanostructured coatings (Ti, Hf, Zr, V, Nb)N are radiation-resistant and perspective as fuel claddings in nuclear reactors.Впервые исследовано влияние высокофлюенсного ионного облучения наноструктурированных покрытий на базе высокоэнтропийного соединения (Ti, Hf, Zr, V, Nb)N. Облучение проводилось ионами гелия с энергией 500 кэВ, в диапазоне флюенсов 5 · 1016–3 · 1017 ион/см2. Для моделирования процессов эксплуатации в ядерном реакторе проведен термический отжиг покрытий после ионного облучения при температуре 773 К в течение 15 мин. Исследованы элементный состав, структура, морфология, а также прочностные свойства покрытий (Ti, Hf, Zr, V, Nb)N до и после облучения. По результатам исследований не выявлено существенных структурных или фазовых изменений покритий после облучения, кроме сильного дробления кристаллитов покрытий до величины менее 10 нм. Также не виявлено изменений в атомном составе покрытий. Установлено нелинейное влияние флюенса облучения на твердость покрытий. По результатам исследований можно утверждать, что наноструктурированные покрытия (Ti, Hf, Zr, V, Nb)N являються радиационно-стойкими и перспективны в качестве покрытий на оболочки ТВЭЛов ядерных реакторов
Structure and physicomechanical properties of NbN-based protective nanocomposite coatings: A review
Recrystallization and formation of spheroidal gold particles in amorphous-like AlN–TiB2–TiSi2 coatings after annealing and subsequent implantation
Structure and properties multilayered micro- and nanocomposite coatings of Ti-N-Al/Ti-N/Al₂O₃
This paper presents the first results on formation and studying of structure and properties of nanocomposite combined coatings. By means of the deposition processes modeling (deposition conditions, current density-discharge, plasma composition and density, voltage) we formed the threelayer nanocomposite coatingsyesBelgorod State Universit
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