The Influence of Silicon Dioxide on the Stability of the Phase Composition and Mechanical Properties of Alumina-Toughened Zirconia-Based Ceramics

Autor:	V. V. Rodaev, A. A. Dmitrievskii, Andrey O. Zhigachev, D. G. Zhigacheva
Rok vydání:	2020
Předmět:	010302 applied physics Materials science Physics and Astronomy (miscellaneous) Silicon dioxide 01 natural sciences 010305 fluids & plasmas Crystallography chemistry.chemical_compound Tetragonal crystal system Fracture toughness chemistry Impurity Phase composition visual_art 0103 physical sciences visual_art.visual_art_medium Cubic zirconia Ceramic Ductility
Zdroj:	Technical Physics. 65:2016-2025
ISSN:	1090-6525 1063-7842
DOI:	10.1134/s1063784220120075
Popis:	The influence of SiO2 impurity (with a concentration varying from 0 to 10 mol %) on the stability of tetragonal ZrO2 (t-ZrO2) and on a set of micro- and macromechanical properties of calcia-stabilized (CCaO = 6.5 mol %) alumina-toughened ( $${{C}_{{{\text{A}}{{{\text{l}}}_{2}}{{{\text{O}}}_{3}}}}}$$ = 5.8 mol %) zirconia-based ceramics (ATZ ceramics) has been studied. It has been found that the introduction of SiO2 ( $${{C}_{{{\text{Si}}{{{\text{O}}}_{2}}}}}$$ = 5 mol %) raises fracture toughness Kc by nearly twofold (from 7.05 to 12.43 MPa m1/2), slightly decreases hardness H (from 12.75 to 10.9 GPa), and improves ultimate compression strength σS (from 2.44 to 2.73 GPa) and ductility (compression strain e grows from 5.3 to 7.3%) of ATZ ceramics. It has been shown that the above improvements were achieved by means of a reduction in t-ZrO2 stability.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::31d3ee5606db0cbe6479f4db2ff29b19 https://doi.org/10.1134/s1063784220120075 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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