Study of Helium Swelling in Nitride Ceramics at Different Irradiation Temperatures

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dc.contributor.authorDukenbayev, Kanat
dc.contributor.authorZdorovets, Maxim
dc.contributor.authorKozlovskiy, Artem
dc.date.accessioned2019-12-11T05:03:31Z
dc.date.available2019-12-11T05:03:31Z
dc.date.issued2019-08-01
dc.description.abstractThis 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 x 10(17)-5 x 10(17) ions/cm(2). 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.en_US
dc.identifier.citationZdorovets, M., Dukenbayev, K., & Kozlovskiy, A. (2019). Study of helium swelling in nitride ceramics at different irradiation temperatures. Materials, 12(15), 2415.en_US
dc.identifier.uriDOI: 10.3390/ma12152415
dc.identifier.urihttp://nur.nu.edu.kz/handle/123456789/4346
dc.language.isoenen_US
dc.publisherNazarbayev University School of Engineering and Digital Sciencesen_US
dc.rightsAttribution-NonCommercial-ShareAlike 3.0 United States*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/3.0/us/*
dc.titleStudy of Helium Swelling in Nitride Ceramics at Different Irradiation Temperaturesen_US
dc.typeArticleen_US
workflow.import.sourcescience

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