Hydrothermal Aging of ATZ Composites Based on Zirconia Made of Powders with Different Yttria Content

The presented work concerns the development and investigation of three different grades of ZrO2 materials containing Al2O3 particles (ATZ-Alumina Toughened Zirconia ceramics with 2.3–20 vol.% of alumina). The zirconia powders conta...

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Autores principales:	Marek Grabowy, Agnieszka Wilk, Radosław Lach, Zbigniew Pędzich
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	alumina toughened zirconia composites low temperature degradation hydrothermal aging Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/c3560666748c49238224b201c8df451a
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spelling	oai:doaj.org-article:c3560666748c49238224b201c8df451a2021-11-11T17:59:36ZHydrothermal Aging of ATZ Composites Based on Zirconia Made of Powders with Different Yttria Content10.3390/ma142164181996-1944https://doaj.org/article/c3560666748c49238224b201c8df451a2021-10-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/21/6418https://doaj.org/toc/1996-1944The presented work concerns the development and investigation of three different grades of ZrO<sub>2</sub> materials containing Al<sub>2</sub>O<sub>3</sub> particles (ATZ-Alumina Toughened Zirconia ceramics with 2.3–20 vol.% of alumina). The zirconia powders containing 3 mol.% of yttria were synthesized by a precipitation/calcination method and fabricated from two different zirconia powders with different yttria content. Then, the selected ATZ composites (ATZ-B, ATZ-10 and ATZ-20) were prepared by means of conventional mixing, compacting and sintering at 1450 °C for 1.5 h. The phase composition, microstructure, relative density and basic mechanical properties were determined. Uniform microstructures with relative densities over 99% of theoretical density, hardness values between 12.0–13.8 GPa, flexural strength up to 1 GPa and outstanding fracture toughness of 12.7 MPa⋅m<sup>1/2</sup> were obtained. The aging susceptibility of alumina toughened zirconia materials, as a consequence of hydrothermal treatment, was investigated. The aim of this study was to determine the influence of LTD (low temperature degradation) on the tetragonal to monoclinic phase transitions and on the flexural strength of hydrothermally aged specimens. The results were compared to those obtained for commercially available tetragonal zirconia-based materials containing 3 mol.% of yttria. This research shows that ATZ composites that have excellent mechanical properties and sufficient hydrothermal aging resistance can be attained and later used in technical and biomedical applications.Marek GrabowyAgnieszka WilkRadosław LachZbigniew PędzichMDPI AGarticlealumina toughened zirconiacompositeslow temperature degradationhydrothermal agingTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6418, p 6418 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	alumina toughened zirconia composites low temperature degradation hydrothermal aging Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	alumina toughened zirconia composites low temperature degradation hydrothermal aging Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Marek Grabowy Agnieszka Wilk Radosław Lach Zbigniew Pędzich Hydrothermal Aging of ATZ Composites Based on Zirconia Made of Powders with Different Yttria Content
description	The presented work concerns the development and investigation of three different grades of ZrO<sub>2</sub> materials containing Al<sub>2</sub>O<sub>3</sub> particles (ATZ-Alumina Toughened Zirconia ceramics with 2.3–20 vol.% of alumina). The zirconia powders containing 3 mol.% of yttria were synthesized by a precipitation/calcination method and fabricated from two different zirconia powders with different yttria content. Then, the selected ATZ composites (ATZ-B, ATZ-10 and ATZ-20) were prepared by means of conventional mixing, compacting and sintering at 1450 °C for 1.5 h. The phase composition, microstructure, relative density and basic mechanical properties were determined. Uniform microstructures with relative densities over 99% of theoretical density, hardness values between 12.0–13.8 GPa, flexural strength up to 1 GPa and outstanding fracture toughness of 12.7 MPa⋅m<sup>1/2</sup> were obtained. The aging susceptibility of alumina toughened zirconia materials, as a consequence of hydrothermal treatment, was investigated. The aim of this study was to determine the influence of LTD (low temperature degradation) on the tetragonal to monoclinic phase transitions and on the flexural strength of hydrothermally aged specimens. The results were compared to those obtained for commercially available tetragonal zirconia-based materials containing 3 mol.% of yttria. This research shows that ATZ composites that have excellent mechanical properties and sufficient hydrothermal aging resistance can be attained and later used in technical and biomedical applications.
format	article
author	Marek Grabowy Agnieszka Wilk Radosław Lach Zbigniew Pędzich
author_facet	Marek Grabowy Agnieszka Wilk Radosław Lach Zbigniew Pędzich
author_sort	Marek Grabowy
title	Hydrothermal Aging of ATZ Composites Based on Zirconia Made of Powders with Different Yttria Content
title_short	Hydrothermal Aging of ATZ Composites Based on Zirconia Made of Powders with Different Yttria Content
title_full	Hydrothermal Aging of ATZ Composites Based on Zirconia Made of Powders with Different Yttria Content
title_fullStr	Hydrothermal Aging of ATZ Composites Based on Zirconia Made of Powders with Different Yttria Content
title_full_unstemmed	Hydrothermal Aging of ATZ Composites Based on Zirconia Made of Powders with Different Yttria Content
title_sort	hydrothermal aging of atz composites based on zirconia made of powders with different yttria content
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/c3560666748c49238224b201c8df451a
work_keys_str_mv	AT marekgrabowy hydrothermalagingofatzcompositesbasedonzirconiamadeofpowderswithdifferentyttriacontent AT agnieszkawilk hydrothermalagingofatzcompositesbasedonzirconiamadeofpowderswithdifferentyttriacontent AT radosławlach hydrothermalagingofatzcompositesbasedonzirconiamadeofpowderswithdifferentyttriacontent AT zbigniewpedzich hydrothermalagingofatzcompositesbasedonzirconiamadeofpowderswithdifferentyttriacontent
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Hydrothermal Aging of ATZ Composites Based on Zirconia Made of Powders with Different Yttria Content

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