|
Journal of Physical Studies 25(4), Article 4601 [6 pages] (2021)
DOI: https://doi.org/10.30970/jps.25.4601 THE DYNAMICS OF CRYSTAL LATTICE OF SOLID SOLUTIONS BASED ON ZIRCONIUM DIOXIDE
V. I. Slisenko1, O. E. Zoteev2
1Institute for Nuclear Research NASU, 47, Nauky Ave., Kyiv, UA–03028, Ukraine,
|
 |
The paper studies structure and dynamics of the crystal lattice of solid solutions based on zirconium dioxide. Structural experiments were performed on a KSN-2 neutron spectrometer (in the ‟diffractrometer” mode) and DRON-3.0 X-ray diffractrometer. The phonon spectrum of solid solutions was obtained using the method of inelastic scattering of thermal neutrons. Dispersion ratios were obtained with KSN-2 (in a ‟triple-axes-spectrometer” mode) on monocrystal samples. It is known that the introduction of such ions as Ca, Y, Nd, Sc into the ZrO$_{2}$ crystal lattice stabilizes the cubic structure of the lattice. Particular attention was paid to the ZrO$_{2}$ system - 33% mol. Y$_{2}$O$_{3}$. In this system, the possibility of formation of a pyrochlor structure was considered. It has been suggested that a phase transition occurs in ZrO$_{2}$-based solid solutions under the influence of neutron irradiation and temperature, which can lead to disruption of coatings made of these materials.
Key words: crystal lattice dynamics, inelastic scattering, thermal neutrons.
