X-ray Diffraction Study of Structural Changes in High-Strength Ceramics Based on Zirconium Oxide with Additions of Ytterbium and Neodymium Oxides after Hydrothermal Treatment

Sirotinkin V. P.; Podzorova L. I; Mikhailina N. A.Penkova O. I

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X-ray Diffraction Study of Structural Changes in High-Strength Ceramics Based on Zirconium Oxide with Additions of Ytterbium and Neodymium Oxides after Hydrothermal Treatment

机译：X-ray Diffraction Study of Structural Changes in High-Strength Ceramics Based on Zirconium Oxide with Additions of Ytterbium and Neodymium Oxides after Hydrothermal Treatment

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A surface structural analysis of two ceramic samples of zirconium oxide (ZrO2) sintered at 1550 degrees C, stabilized in the tetragonal form, before and after hydrothermal treatment, has been performed by the Rietveld method based on X-ray diffraction (XRD) data. The first sample was zirconium oxide with addition of ytterbium oxide (3 mol %), and the second sample contained ytterbium (3 mol %) and neodymium (0.25 mol %) oxides. The hydrothermal treatment is found to change the phase composition. In the initial state, there are two tetragonal ZrO2 forms (t and t'). The processes of surface-layer dissolution and crystallization of the monoclinic ZrO2 modification occur during hydrothermal treatment. ZrO2 crystals are shaped as plates elongated in the [111] direction, with developed {001} faces. Addition of neodymium oxide slows down the monoclinic-phase formation.

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《Crystallography reports》 |2022年第2期|278-285|共8页
作者
Sirotinkin V. P.; Podzorova L. I; Mikhailina N. A.Penkova O. I;
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Russian Acad Sci;

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正文语种英语
中图分类晶体学;
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LOW-TEMPERATURE DEGRADATION; TETRAGONAL PHASE; MICROSTRUCTURE; PROGRAM;

X-ray Diffraction Study of Structural Changes in High-Strength Ceramics Based on Zirconium Oxide with Additions of Ytterbium and Neodymium Oxides after Hydrothermal Treatment

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