Mechanical properties, strength physics and plasticity

Features of the monoclinic-tetragonal transition in ZrO$_2$

V. P. Gorelov, S. A. Belyakov

Institute of High-Temperature Electrochemistry, RAS, Yekaterinburg, Russia

Abstract: A critical analysis of the features of the monoclinic-tetragonal $(m\leftrightarrow t)$ phase transition in ZrO$_2$ has been carried out, taking into account the existence of three monoclinic forms $m$, $m'$ and $m''$, which change one into another with increasing temperature, as well as the state of the material (single crystal, ceramics, powder). The dilatometric effects accompanying the transition on ceramic samples, namely jumps in the curve and their features, were experimentally studied and discussed. It has been shown that the jumps are a consequence of material cracking during the $m''\leftrightarrow t$ transition and are not the transition itself. Keywords: ZrO$_2$, dilatometry, DTA, monoclinic polymorphs.

Keywords: ZrO$_2$, dilatometry, DTA, monoclinic polymorphs.

Received: 19.07.2023
Revised: 02.10.2023
Accepted: 31.10.2023

DOI: 10.61011/FTT.2023.12.56774.158

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