Number of the records: 1
Crystallization kinetics of amorphous alumina–zirconia–silica ceramics
- 1.
SYSNO ASEP 0329728 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Crystallization kinetics of amorphous alumina–zirconia–silica ceramics Title Kinetika 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 Journal of the European Ceramic Society. - : Elsevier - ISSN 0955-2219
Roč. 29, č. 15 (2009), s. 3159-3165Number of pages 7 s. Publication form web - web Language eng - English Country GB - United Kingdom 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) UT WOS 000270162100007 DOI doi:10.1016/j.jeurceramsoc.2009.05.020 Annotation Crystallization kinetics of amorphous alumina–zirconia–silica ceramics was studied by nonisothermal differential scanning calorimetry (DSC). Different amorphous materials were produced by plasma spraying of near-eutectic Al2O3–ZrO2–SiO2 mixtures. Phase composition and microstructure of the amorphous materials and nanocrystalline products were analyzed. All of the investigated materials show an exothermic peak between 940 and 990 C in the DSC experiments. The activation energies calculated from DSC traces decrease with increasing SiO2 concentration. 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. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2010
Number of the records: 1