Abstract:
The key aim of this paper is to study the presence effect of LiO impurity phases in Li2ZrO3
ceramics on the resistance to helium swelling and structural degradation during implanted helium
accumulation in the near-surface layer structure. The hypothesis put forward is based on a number
of scientific papers, in which it was reported that the presence of two or more phases in lithiumcontaining ceramics led to a decrease in the rate of radiation damage and gas swelling due to the
presence of additional interfacial boundaries that prevent the point defect accumulation. As a result
of the evaluation of the crystal structure deformation, it was found that the presence of the LiO
impurity phase in the structure of Li2ZrO3 ceramics led to a threefold decrease in the deformation of
the crystal lattice due to helium swelling at doses of 5 × 1017–5 × 1018 ion/cm2
. At the same time, the
nature of the crystal lattice deformation for different ceramic types is different: in the case of Li2ZrO3
ceramics, an anisotropic distortion of the crystal structure is observed, in the case of Li2ZrO3/LiO
ceramics, the crystal lattice deformation has an isotropic nature.
