Effects of sintering curves on microstructure, physical and mechanical properties and on low temperature degradation of zirconia-toughened alumina

Autor:	K.S Kamyshnaya, T. A. Khabas, V.A. Kutugin, O. Yu. Zadorozhnaya, S.E. Malykhin
Rok vydání:	2021
Předmět:	Matrix (chemical analysis) Materials science Flexural strength Zirconia Toughened Alumina Vapour pressure of water Materials Chemistry Ceramics and Composites Sintering Degradation (geology) Composite material Microstructure Hydrothermal circulation
Zdroj:	Journal of the European Ceramic Society. 41:274-281
ISSN:	0955-2219
DOI:	10.1016/j.jeurceramsoc.2021.09.009
Popis:	The objective of this work was to study two-step sintering as a means of controlling the microstructure of coarse Al2O3 matrix composites containing submicrometric and nanometric inclusions of ZrO2 ranging from 0–30 wt. % by weight based on commercially available powders and evaluate its hydrothermal degradation as function of a water vapour pressure and its mechanical properties. The results showed that two-step sintering allowed a more efficient microstructural control than single-step sintering, resulting in good mechanical properties. The highest flexural strength was achieved for ZTA samples sintered in two-stage sintering conditions TSS2 with T1 = 1560 °C for 3 h, T2 = 1460 °C for 8 h. The studied composites showed good resistance to hydrothermal degradation compared to composites sintered in single step sintering conditions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::87a77fdfeaae73122c795615ca151c1f https://doi.org/10.1016/j.jeurceramsoc.2021.09.009 Zobrazit plný text záznamu Full Text from ScienceDirect