Abstract:
The results obtained reflect the determination of the possibility of the stability
enhancement of the strength and thermal parameters of zirconium-containing ceramic
materials via the addition of a stabilizing additive in the form of Y2O3. According to the
data obtained, a connection between phase transformations caused by the addition of the
stabilizing Y2O3 additive and an increase in strength characteristics, the growth of which is
also due to the formation of the dispersion hardening effect during grain size reduction,
was established. It was found that the formation of the stabilized Zr(Y)O2 phase results in
thermal conductivity reduction, while the formation of the perovskite phase YZrO3 has
a positive effect on the thermophysical parameters of ceramics. It was determined that
the change in phase composition associated with the formation of the tetragonal Zr(Y)O2
phase at low dopant concentrations leads to an increase in strength characteristics, but a
decrease in thermal conductivity, while the formation of the YZrO3 phase in the structure
contributes to a growth not only in strength, but also thermophysical parameters.
