Phenomena Occurring upon the Sintering of a Mixture of Yttria–Zirconia Nanometric Powder and Sub-Micrometric Pure Zirconia Powder

Mixtures of powders essentially differing in their particle morphology and size were applied to prepare polycrystals in a Y2O3-ZrO2 system. An yttria–zirconia solid solution nanometric powder with a Y2O<su...

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Autores principales:	Kamil Wojteczko, Zbigniew Pędzich, Dariusz Zientara, Katarzyna Berent, Krzysztof Haberko
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	ZrO<sub>2</sub>-Y<sub>2</sub>O<sub>3</sub> hydrothermal crystallization sintering microstructure matter transfer 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/17db47c970404f6fa68e9dff2c9203d4
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spelling	oai:doaj.org-article:17db47c970404f6fa68e9dff2c9203d42021-11-25T18:14:52ZPhenomena Occurring upon the Sintering of a Mixture of Yttria–Zirconia Nanometric Powder and Sub-Micrometric Pure Zirconia Powder10.3390/ma142269371996-1944https://doaj.org/article/17db47c970404f6fa68e9dff2c9203d42021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/22/6937https://doaj.org/toc/1996-1944Mixtures of powders essentially differing in their particle morphology and size were applied to prepare polycrystals in a Y<sub>2</sub>O<sub>3</sub>-ZrO<sub>2</sub> system. An yttria–zirconia solid solution nanometric powder with a Y<sub>2</sub>O<sub>3</sub> concentration of 3.5% was prepared by subjecting co-precipitated gels to hydrothermal treatment at 240 °C. The crystallization occurred in distilled water. The pure zirconia powders composed of elongated and sub-micrometer size particles were also manufactured through the hydrothermal treatment of pure zirconia gel, although in this case, the process took place in the NaOH solution. Mixtures of the two kinds of powder were prepared so as to produce a mean composition corresponding to an yttria concentration of 3 mol%. Compacts of this powder mixture were sintered, and changes in phase composition vs. temperature were studied using X-ray diffraction. The dilatometry measurements revealed the behavior of the powder compact during sintering. The polished surfaces revealed the microstructure of the resulting polycrystal. Additionally, the electron back scattering diffraction technique (EBSD) allowed us to identify symmetry between the observed grains. Hardness, fracture toughness, and mechanical strength measurements were also performed.Kamil WojteczkoZbigniew PędzichDariusz ZientaraKatarzyna BerentKrzysztof HaberkoMDPI AGarticleZrO<sub>2</sub>-Y<sub>2</sub>O<sub>3</sub> hydrothermal crystallizationsinteringmicrostructurematter transferTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6937, p 6937 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	ZrO<sub>2</sub>-Y<sub>2</sub>O<sub>3</sub> hydrothermal crystallization sintering microstructure matter transfer 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	ZrO<sub>2</sub>-Y<sub>2</sub>O<sub>3</sub> hydrothermal crystallization sintering microstructure matter transfer 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 Kamil Wojteczko Zbigniew Pędzich Dariusz Zientara Katarzyna Berent Krzysztof Haberko Phenomena Occurring upon the Sintering of a Mixture of Yttria–Zirconia Nanometric Powder and Sub-Micrometric Pure Zirconia Powder
description	Mixtures of powders essentially differing in their particle morphology and size were applied to prepare polycrystals in a Y<sub>2</sub>O<sub>3</sub>-ZrO<sub>2</sub> system. An yttria–zirconia solid solution nanometric powder with a Y<sub>2</sub>O<sub>3</sub> concentration of 3.5% was prepared by subjecting co-precipitated gels to hydrothermal treatment at 240 °C. The crystallization occurred in distilled water. The pure zirconia powders composed of elongated and sub-micrometer size particles were also manufactured through the hydrothermal treatment of pure zirconia gel, although in this case, the process took place in the NaOH solution. Mixtures of the two kinds of powder were prepared so as to produce a mean composition corresponding to an yttria concentration of 3 mol%. Compacts of this powder mixture were sintered, and changes in phase composition vs. temperature were studied using X-ray diffraction. The dilatometry measurements revealed the behavior of the powder compact during sintering. The polished surfaces revealed the microstructure of the resulting polycrystal. Additionally, the electron back scattering diffraction technique (EBSD) allowed us to identify symmetry between the observed grains. Hardness, fracture toughness, and mechanical strength measurements were also performed.
format	article
author	Kamil Wojteczko Zbigniew Pędzich Dariusz Zientara Katarzyna Berent Krzysztof Haberko
author_facet	Kamil Wojteczko Zbigniew Pędzich Dariusz Zientara Katarzyna Berent Krzysztof Haberko
author_sort	Kamil Wojteczko
title	Phenomena Occurring upon the Sintering of a Mixture of Yttria–Zirconia Nanometric Powder and Sub-Micrometric Pure Zirconia Powder
title_short	Phenomena Occurring upon the Sintering of a Mixture of Yttria–Zirconia Nanometric Powder and Sub-Micrometric Pure Zirconia Powder
title_full	Phenomena Occurring upon the Sintering of a Mixture of Yttria–Zirconia Nanometric Powder and Sub-Micrometric Pure Zirconia Powder
title_fullStr	Phenomena Occurring upon the Sintering of a Mixture of Yttria–Zirconia Nanometric Powder and Sub-Micrometric Pure Zirconia Powder
title_full_unstemmed	Phenomena Occurring upon the Sintering of a Mixture of Yttria–Zirconia Nanometric Powder and Sub-Micrometric Pure Zirconia Powder
title_sort	phenomena occurring upon the sintering of a mixture of yttria–zirconia nanometric powder and sub-micrometric pure zirconia powder
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/17db47c970404f6fa68e9dff2c9203d4
work_keys_str_mv	AT kamilwojteczko phenomenaoccurringuponthesinteringofamixtureofyttriazirconiananometricpowderandsubmicrometricpurezirconiapowder AT zbigniewpedzich phenomenaoccurringuponthesinteringofamixtureofyttriazirconiananometricpowderandsubmicrometricpurezirconiapowder AT dariuszzientara phenomenaoccurringuponthesinteringofamixtureofyttriazirconiananometricpowderandsubmicrometricpurezirconiapowder AT katarzynaberent phenomenaoccurringuponthesinteringofamixtureofyttriazirconiananometricpowderandsubmicrometricpurezirconiapowder AT krzysztofhaberko phenomenaoccurringuponthesinteringofamixtureofyttriazirconiananometricpowderandsubmicrometricpurezirconiapowder
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Phenomena Occurring upon the Sintering of a Mixture of Yttria–Zirconia Nanometric Powder and Sub-Micrometric Pure Zirconia Powder

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