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Inorganic Materials: Applied Research

, Volume 7, Issue 5, pp 750–755 | Cite as

Effect of annealing on the structure and phase transformation in ZrO2–MgO ceramic powders

  • A. V. Kanaki
  • S. P. Buyakova
  • S. N. Kulkov
General Purpose Materials
  • 24 Downloads

Abstract

The structure and phase composition of ZrO2–MgO powders with the MgO content from 9 to 43 mol % obtained by the plasma chemical method after annealing at 700–1400°С are studied. Differential scanning calorimetry and powder thermogravimetric analysis are carried out. It is found that, in the course of heating, the mass loss and the endothermic reactions energy increase with the increase in the MgO content. In the initial state, the powders containing more than 25 mol % of MgO are supersaturated solid solutions of cubic ZrO2. Water desorption processes and decomposition of residual nitrates are observed in powders up to 420°С. The endothermic peak at high temperatures is due to the dehydration process and decomposition of the cubic ZrO2 solid solution.

Keywords

zirconium dioxide magnesia phase transformations endothermic reaction dehydration 

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Copyright information

© Pleiades Publishing, Ltd. 2016

Authors and Affiliations

  1. 1.National Research Tomsk State UniversityTomskRussia
  2. 2.Institute of Strength Physics and Materials Science, Siberian BranchRussian Academy of SciencesTomskRussia

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