An Investigation of Phase Stability of a Composite ATZ Ceramic Material

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Abstract

An investigation of phase transformations, taking place in a composite ZrO2(Y)–Al2O3 ceramic material sintered from ultrafine powders manufactured by a plasmochemical process, is performed during its storage and subsequent thermal heating. The composite low-porosity ceramics based on zirconium dioxide is found to be stable in interactions with the environment during long-term storage under standard conditions and thermal heating. A high efficiency of a spontaneous t→m phase transformation is observed in the composite ceramics with an open porosity of more than 6%. The composite ceramics, in which low porosity is combined with a reduced content of the stabilizing yttrium impurity in the crystal lattice of zirconium dioxide, is characterized by the lowest phase stability.

Original languageEnglish
Pages (from-to)1593-1599
Number of pages7
JournalRussian Physics Journal
Volume57
Issue number11
DOIs
Publication statusPublished - 1 Mar 2015

Keywords

  • calorimetry
  • composite ceramics
  • dilatometry
  • phase stability
  • zirconia

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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