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Study of Changes in Optical and Heat-Conducting Properties of AlN Ceramics under Irradiation with Kr15+ and Xe22+ Heavy Ions

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dc.contributor.author Kozlovskiy, Artem L.
dc.contributor.author Zdorovets, Maxim V.
dc.contributor.author Uglov, Vladimir V.
dc.date.accessioned 2024-09-17T10:44:54Z
dc.date.available 2024-09-17T10:44:54Z
dc.date.issued 2020
dc.identifier.issn 2079-4991
dc.identifier.other doi:10.3390/nano10122375
dc.identifier.uri http://rep.enu.kz/handle/enu/16498
dc.description.abstract AlN-based ceramics have great prospects for use in the field of structural materials for reactors of the new generation of GenIV, as well as dosimetric and optical devices. Interest in them is due to their unique physical and chemical properties, high resistance to degradation and excellent insulating properties. This work is devoted to the study of changes in the optical and heat-conducting properties of AlN ceramics as a result of irradiation with Kr15+ and Xe22+ heavy ions with energies close to those of fission fragments of uranium nuclei, and fluences 1014–1015 ion/cm2 . During the study, dose relationships of changes in the optical properties of ceramics were established, as well as the effect of the type of ions on the degree of radiation damage and deterioration of optical characteristics. It has been found that an increase in the irradiation dose for Kr15+ ions leads to a slight increase in the depth of electron traps, while for samples irradiated with Xe22+ ions there is a sharp increase in the depth of occurrence from 5 to 20%, depending on the irradiation dose. For samples irradiated with Xe22+ ions, the greatest decrease in thermal conductivity was 19%, while for ceramics irradiated with Kr15+ ions, the maximum decrease was not more than 10%. The results show a significant resistance of ceramics to radiation damage by Kr15+ ions and negative effects, leading to a decrease in the resistance of optical and conductive properties of ceramics when irradiated with Xe22+ ions with doses higher than 5 × 1014 ion/cm2 . Using the X-ray diffraction method, the dependences of structural distortions and changes in dislocation density in the structure of ceramics on the radiation dose were established. It has been determined that the main structural changes are associated with the fragmentation of grains, which result in an increase in the dislocation density, as well as deformation and distortion of the crystal lattice as a result of the formation of complex defects in the structure. ru
dc.language.iso en ru
dc.publisher Nanomaterials ru
dc.relation.ispartofseries Volume 10;Issue 12
dc.subject radiation damage ru
dc.subject optical properties ru
dc.subject aluminum nitride ru
dc.subject defects ru
dc.subject fission fragments ru
dc.subject heavy ions ru
dc.title Study of Changes in Optical and Heat-Conducting Properties of AlN Ceramics under Irradiation with Kr15+ and Xe22+ Heavy Ions ru
dc.type Article ru


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