EFFECT OF HIGH-FLUENCE ION IRRADIATION ON THE STUCTURE AND MECHANICAL PROPERTIES OF COATINGS BASED ON NANOSTRUCTURED NITRIDES OF HIGH-ENTROPY ALLOYS (Ti, Hf, Zr, V, Nb)
Abstract
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.
About the Authors
F. F. KOMAROV
A. N. Sevchenko Institute of Applied Physical Problems of Belarusian State University, Minsk
Belarus
Belarus
S. V. KONSTANTINOV
A. N. Sevchenko Institute of Applied Physical Problems of Belarusian State University, Minsk
Belarus
Belarus
A. D. POGREBNJAK
Sumy State University, Sumy
Ukraine
Ukraine
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