Study of Helium Swelling in Nitride Ceramics at Different Irradiation Temperatures
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Engineering Profile Laboratory, L.N. Gumilyov Eurasian National University, Astana 010008, Kazakhstan
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Laboratory of Solid State Physics, The Institute of Nuclear Physics, Almaty 050032, Kazakhstan
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Department of Intelligent Information Technologies, Ural Federal University, 620075 Yekaterinburg, Russia
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School of Engineering, Nazarbayev University, Nur-Sultan 010008, Kazakhstan
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Laboratory of Additive Technologies, Kazakh-Russian International University, Aktobe 030006, Kazakhstan
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Authors to whom correspondence should be addressed.
Materials 2019, 12(15), 2415; https://doi.org/10.3390/ma12152415
Received: 8 July 2019
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Revised: 26 July 2019
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Accepted: 27 July 2019
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Published: 29 July 2019
(This article belongs to the Section Advanced Materials Characterization)
This paper presents the results of a systematic study of helium swelling and the subsequent process of degradation of the near-surface layer of aluminum-based nitride ceramics. The samples were irradiated with 40 keV He2+ ions at temperatures of 300 and 1000 K with a fluence of 1 × 1017–5 × 1017 ions/cm2. The choice of radiation doses and temperature conditions was due to the possibility of simulating reactor tests of structural materials. It has been established that an increase in the irradiation fluence leads to the formation of large agglomerates of clusters of helium bubbles, as well as an increase in the degree of roughness and waviness of the surface with the formation of crater-like inclusions. In the case of irradiation at high temperatures, there was a slight decrease in the average size of helium inclusions compared with irradiation at room temperature. However, the density of inclusions and surface roughness were much higher. It is established that irradiation at room temperatures leads to a sharp decrease in ceramics density, as well as deformation of the crystal structure due to an increase in the density of dislocations and macrostresses in the structure. The decrease in ceramics density due to the formation of helium inclusions led to an increase in porosity and a defective fraction in the structure of the surface layer of ceramics.
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Keywords:
swelling; helium bubbling; nitride ceramics; construction materials; destruction
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MDPI and ACS Style
Zdorovets, M.V.; Dukenbayev, K.; Kozlovskiy, A.L. Study of Helium Swelling in Nitride Ceramics at Different Irradiation Temperatures. Materials 2019, 12, 2415. https://doi.org/10.3390/ma12152415
AMA Style
Zdorovets MV, Dukenbayev K, Kozlovskiy AL. Study of Helium Swelling in Nitride Ceramics at Different Irradiation Temperatures. Materials. 2019; 12(15):2415. https://doi.org/10.3390/ma12152415
Chicago/Turabian StyleZdorovets, Maxim. V., Kanat Dukenbayev, and Artem. L. Kozlovskiy. 2019. "Study of Helium Swelling in Nitride Ceramics at Different Irradiation Temperatures" Materials 12, no. 15: 2415. https://doi.org/10.3390/ma12152415
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