Study of radiation resistance to helium swelling of AlN ceramics in case of irradiation with low-energy He2+ ions with energy of 40 keV
Kozlovskiy A.L. Kenzhina I.E. Zdorovets M.V.
June 2021Springer
Journal of Materials Science: Materials in Electronics
2021#32Issue 1114347 - 14357 pp.
In recent years, ceramic materials based on nitrides are of particular interest, which have great potential to be used as the basis of structural materials. At the same time, great attention is paid to the processes of studying radiation damage and the mechanisms of evolution of radiation defects that cause irreversible structural changes that reduce the operational characteristics of materials. The purpose of this work is to study the mechanisms of radiation damage and helium swelling in ceramics based on aluminum nitride caused by irradiation with low-energy He2+ ions with an energy of 40 keV and radiation doses of 1 × 1016–1 × 1018 ion/cm2. During the research, the dependences of changes in structural, morphological, and strength characteristics on the radiation dose were obtained. The critical values of radiation doses (3–5 × 1017 ion/cm2) for which the degree of radiation damage increases sharply have been established. It was determined that at a dose above 3 × 1017 ion/cm2 there is a sharp increase in structural distortions and deformations, which are due to partial swelling of the crystal lattice, as well as an increase in the concentration of embedded helium. It was found that increasing the irradiation dose to 5–7 × 1017 ion/cm2 leads to a sharp increase in the formation of helium bubbles on the surface, and their rupture with the formation of broken areas in the near-surface layer of ceramics.
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The Institute of Nuclear Physics, Almaty, 050032, Kazakhstan
L.N. Gumilyov Eurasian National University, Nur-Sultan, 010008, Kazakhstan
Department of Intelligent Information Technologies, Ural Federal University, Yekaterinburg, 620075, Russian Federation
The Institute of Nuclear Physics
L.N. Gumilyov Eurasian National University
Department of Intelligent Information Technologies
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