Abstract

Nanocrystalline ceramic samples of the ZrO₂–3 mol % Y₂O₃ composition with varying degrees of tetragonality c/a (1.4337 and 1.0425) are obtained. The process of the low-temperature degradation of ceramics is studied by the methods of X-ray phase analysis and electron microscopy. It is found that samples with a high degree of tetragonality are more resistant to the action of a humid environment, while the phase composition in the bulk of the samples remains practically unchanged and the transformation t-ZrO₂ → m-ZrO₂ occurs mainly in the surface layers without significantly affecting the mechanical properties of the ceramics.

中文翻译：

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获得具有不同程度四方性的 ZrO2–3 mol % Y2O3 陶瓷并研究低温降解

摘要

获得了 ZrO ₂ –3 mol % Y ₂ O ₃组成的纳米晶陶瓷样品，具有不同程度的四方性c / a（1.4337 和 1.0425）。采用X射线物相分析和电子显微镜等方法研究了陶瓷的低温降解过程。发现具有高度四方性的样品更能抵抗潮湿环境的作用，而大部分样品中的相组成几乎保持不变，转变t -ZrO ₂ → m -ZrO ₂ 主要发生在表层，对陶瓷的机械性能没有显着影响。