Experimental study of the properties of ZrO₂Y₂O₃ and HfO₂Y₂O₃ solid solutions

Abstract

I. M. Sil'vestrova and N. N. Sobolev The P. N. Lebedev Physical Institute, Academy of Sciences of the U.S.S.R., Moscow, U.S.S.R. The Mandel'shtam-Brillouin spectra of single crystals of Zr02-Yz03 and Hf02-Yz03 solid solutions have been measured and the results explained qualitatively. Using the methods of Mandel'shtam-Brillouin spectra and ultrasound propagation the elastic and photoelastic constants of single crystals of ZrOz-YzO, and HfOt-Y203 solid solutions have been found and their dependence on the composition obtained. The elastic and photoelastic properties of single crystals of these solid solutions are discussed.

Evaluation of Segregation in Polycrystalline 10 mol% Yttria Doped Zirconia (10YSZ)

“…Finally, the lattice parameter at the largest angle, that is reflective of the bulk phase, is 0.515 nm. The latter value is slightly larger from the data reported in the literature, including for YSZ single crystal, a=0.5142 nm [12] and for polycrystalline YSZ, a=0.5141 nm [11].…”

“…Fig. 2 represents the lattice parameter vs. the glancing angle, including the data determined in this work along with the data reported in the literature [11][12]. As seen, the lattice parameter at very small angles, related to the near-surface layer, varies in the range 0.511 -0.512 nm.…”

Thermal Properties of Stabilized Zirconia at Low Temperatures

“…% yttria samples. Other elastic measurements by Chistyi et al (1977) on Zr02+8, 10, 12, 16 mol.% Y 2 0 3 are in substantial agreement with Farley et al [Note that Ackerman et al (1984) quoted B = 290 GPa in their tabulation of data. ]…”

“…Plots of cpl T against T2 indicate an anomaly of the Schottky type that is important below about 3 K. We have fitted the experimental values below 7 K, after subtracting a Debye (lattice) T3 term for which @o = 540 K from elastic data (Pace et al 1969;Farley et al 1972;Chistyi et al 1977), to a Schottky term plus a linear term and a T 5 term using a nonlinear least-squares procedure, i.e . .…”

Elastic behavior of single crystals of ytrria-stabilized zirconia

“…Single Crystal Elastic Constants of YSZ Data for elastic constants for single crystals of YSZ, were available only at room temperature[5,[19][20][21] and below[22,23]. Because of the high Debye temperature of this material, the elastic constants below room temperature orientation of the crystals was done withx-ray diffraction, and five specimens were cut from the 'as grown' crystals with a diamond saw.…”