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Crystallization kinetics of amorphous alumina zirconia silica ceramics
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SYSNO ASEP 0336711 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Crystallization kinetics of amorphous alumina zirconia silica ceramics Title Krystalizace amorfní keramiky obsahující Al2O3-ZrO2-SiO2 Author(s) Chráska, Tomáš (UFP-V) RID, ORCID
Hostomský, Jiří (UACH-T)
Klementová, Mariana (UACH-T) RID, SAI, ORCID
Dubský, Jiří (UFP-V) RIDSource Title Microscopy and Microanalysis. - : Cambridge University Press - ISSN 1431-9276
Roč. 15, S2 (2009), s. 1000-1001Number of pages 2 s. Language eng - English Country US - United States Keywords Nanocomposites ; Al2O3 ; ZrO2 ; SiO2 ; Solid-state reaction Subject RIV JH - Ceramics, Fire-Resistant Materials and Glass R&D Projects KAN300430651 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z20430508 - UFP-V (2005-2011) AV0Z40320502 - UACH-T (2005-2011) Annotation Crystallization of amorphous alumina–zirconia–silica ceramics was studied for seven different amorphous materials produced by plasma spraying. The activation energies calculated from DSC traces decrease with increasing SiO2 concentration from 1500 to 900 kJ/mol. Values of the Avrami coefficients together with results of the microstructural observations indicate that tetragonal zirconia crystallization from materials containing more than 10 wt.% SiO2 proceeds by a diffusion-controlled mechanism with nucleation occurring predominantly at the beginning of the process. Material with almost no SiO2 exhibited a value of the Avrami exponent consistent with the crystal growth governed by processes at the phase boundary. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2010
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