Tetragonal phase formed in liquid quenched ZrO2-9 mol % MgO and its thermal stability
Ceramics were formed by the addition of magnesia to zirconia in the composition range of 0 to 50 mol %, and these ceramic materials were liquid quenched using an infrared image furnace and a twin roll process. The composition and structure of the liquid-quenched film samples were examined using X-ra...
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Veröffentlicht in: | Journal of the Ceramic Society of Japan 2015/06/01, Vol.123(1438), pp.492-500 |
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Hauptverfasser: | , |
Format: | Artikel |
Sprache: | eng ; jpn |
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Zusammenfassung: | Ceramics were formed by the addition of magnesia to zirconia in the composition range of 0 to 50 mol %, and these ceramic materials were liquid quenched using an infrared image furnace and a twin roll process. The composition and structure of the liquid-quenched film samples were examined using X-ray diffraction and transmission electron microscopy. The results confirmed the formation of a high-temperature metastable phase (t′-phase) in ZrO2-9 mol % MgO partially stabilized zirconia (PSZ). The t′-phase that formed underwent a transition to the stable tetragonal phase (t-phase) during a suitable annealing treatment, but it was found not to undergo a phase transformation to the monoclinic phase (m-phase) in the presence of external stress. The t′-phase was confirmed to have three variants. |
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ISSN: | 1882-0743 1348-6535 |
DOI: | 10.2109/jcersj2.123.492 |