The dynamics of crystal lattice of solid solutions based on zirconium dioxide

Abstract

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 (cid:16)di(cid:27)ractrometer(cid:17) mode) and DRON-3.0 X-ray di(cid:27)ractrometer. 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 (cid:16)triple-axes-spectrometer(cid:17) 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 (cid:21) 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 in(cid:29)uence of neutron irradiation and temperature, which can lead to disruption of coatings made of these