Abstract
Attempts to synthesize ZnY2O4 are made via a solid-state reaction in a high-temperature X-ray powder diffraction chamber as well as analyzing Y2O3 sinter ceramics pressure infiltrated by ZnO in a scanning electron microscope using energy-dispersive X-ray spectroscopy and electron backscatter diffraction (EBSD). The microstructure of the sinter ceramic is composed of ZnO grains dispersed in an Y2O3 matrix. Superimposed EBSD patterns of Y2O3 are misindexed as ZnY2O4 during the EBSD scan. The literature concerning ZnY2O4 is critically discussed.
Highlights
Creating new phases with interesting properties is a general goal in materials science
We investigate the solid-state interaction of Y2O3 and ZnO in a HT-X-ray powder diffraction (XRPD) chamber and analyze the microstructure of an Y2O3 ceramic pressure infiltrated with ZnO and sintered at 1500 °C using XRPD, scanning electron microscope (SEM), EDXS, and electron backscatter diffraction (EBSD) in an attempt to locate a phase with the composition
Y2O3 ceramics containing 2.0(1) wt % ZnO were prepared by pressure infiltration and subsequent sintering
Summary
Creating new phases with interesting properties is a general goal in materials science. In order to test the hypothesis that all data points attributed to ZnY2O4 by the indexing process (8 bands detected, Hough resolution 60, and 40 to 44 reflectors activated for each phase) suffer from pattern superposition, a set scan frame was started three times with increasing EBSDpattern quality settings, i.e., using a binning of 8 × 8, 4 × 4, and 2 × 2. This does not prove that ZnY2O4 does not exist in the analyzed ceramic, this result matches the expectation as a higher pattern quality increases the probability that weaker components of a secondary crystal lattice are detected for evaluation. It failed to be detected after the experiments presented here
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